• Accessibility conditions of MIMO nonlinear control systems on homogeneous time scalesBartosiewicz, Zbigniew; Kotta, Ülle; Tõnso, Maris; Wyrwas, MałgorzataMathematical control and related fields2016 / p. 217-250 https://doi.org/10.3934/mcrf.2016002 https://www.scopus.com/sourceid/21100256977 https://www.scopus.com/record/display.uri?eid=2-s2.0-84964505032&origin=inward&txGid=b19f65c78d1560ca94ddea9a3d64ff20 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=MATH%20CONTROL%20RELAT%20F&year=2016 https://www.webofscience.com/wos/woscc/full-record/WOS:000380129600002
• Acessibility conditions for discrete time nonlinear multiinput multioutput systemsKotta, Ülle; Tõnso, Maris5th Junior European Meeting on Control & Information Technology : September 20-22, 2006, Tallinn, Estonia : book of abstracts2006 / p. 25
• Adjoint polynomial formulas for nonlinear state-space realizationBelikov, Juri; Kotta, Ülle; Tõnso, MarisIEEE transactions on automatic control2014 / p. 256-261 https://doi.org/10.1109/TAC.2013.2270868 https://www.scopus.com/sourceid/17339 https://www.scopus.com/record/display.uri?eid=2-s2.0-84891599092&origin=inward&txGid=2fed25b583e3aabca53013d5fc88d1f7 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=IEEE%20T%20AUTOMAT%20CONTR&year=2014 https://www.webofscience.com/wos/woscc/full-record/WOS:000330760400027
• Algebraic formalism of differential p-forms and vector fields for nonlinear control systems on homogeneous time scalesBartosiewicz, Zbigniew; Kotta, Ülle; Pawluszewicz, Ewa; Tõnso, Maris; Wyrwas, MałgorzataProceedings of the Estonian Academy of Sciences2013 / p. 215-226 https://doi.org/10.3176/proc.2013.4.02 https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-84887841347&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.3176%2Fproc.2013.4.02%29&sessionSearchId=f124baea23c7e59a88234b4350eaca80 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2013 https://www.webofscience.com/wos/woscc/full-record/WOS:000327478600002
• Comparison of LPV and nonlinear system theory : a realization problemBelikov, Juri; Kotta, Ülle; Tõnso, MarisSystems & control letters2014 / p. 72-78 https://doi.org/10.1016/j.sysconle.2013.10.009 https://www.scopus.com/sourceid/25563 https://www.scopus.com/record/display.uri?eid=2-s2.0-84891678902&origin=inward&txGid=1b574111345af39f579788193a29ec1e https://jcr.clarivate.com/jcr-jp/journal-profile?journal=SYST%20CONTROL%20LETT&year=2014 https://www.webofscience.com/wos/woscc/full-record/WOS:000332441600010
• Computer algebra tools for modelling, analysis and synthesis for nonlinear control systems = Arvutialgebra vahendid mittelineaarsete juhtimissüsteemide modelleerimiseks, analüüsiks ja sünteesiksTõnso, Maris2010 https://www.ester.ee/record=b2552427*est
• Effective algebraic analysis approach to linear systems over Ore algebrasCluzeau, T.; Koutschan, C.; Quadrat, A.; Tõnso, MarisAlgebraic and symbolic computation methods in dynamical systems2020 / p. 3-52 https://doi.org/10.1007/978-3-030-38356-5_1
• Feedback linearization and lattice theoryKotta, Ülle; Tõnso, Maris; Shumsky, Alexey Ye.; Zhirabok, Alexey N.Systems & control letters2013 / p. 248-255 https://doi.org/10.1016/j.sysconle.2012.11.014 https://www.scopus.com/sourceid/25563 https://www.scopus.com/record/display.uri?eid=2-s2.0-84872386817&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.1016%2Fj.sysconle.2012.11.014%29&sessionSearchId=6024cf363338b9853eb843d4b5941a66&relpos=0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=SYST%20CONTROL%20LETT&year=2013 https://www.webofscience.com/wos/woscc/full-record/WOS:000317257500004
• Feedback linearization of an active magnetic bearing system operated with a zero-bias fluxMystkowski, Arkadiusz; Kaparin, Vadim; Kotta, Ülle; Pawluszewicz, Ewa; Tõnso, MarisInternational journal of applied mathematics and computer science2017 / p. 539-548 : ill https://doi.org/10.1515/amcs-2017-0038 https://www.scopus.com/sourceid/4500151509 https://www.scopus.com/record/display.uri?eid=2-s2.0-85030526920&origin=inward&txGid=c7b0caceaa315d4f6c91b0a85d915ae4 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=INT%20J%20AP%20MAT%20COM-POL&year=2023 https://www.webofscience.com/wos/woscc/full-record/WOS:000411568700008
• Functions' algebra in nonlinear control : computational aspects and softwareBelikov, Juri; Kaldmäe, Arvo; Kaparin, Vadim; Kotta, Ülle; Shumsky, Alexey Ye.; Tõnso, Maris; Zhirabok, AlexeyProceedings of the Estonian Academy of Sciences2017 / p. 89-107 https://doi.org/10.3176/proc.2017.1.06 http://www.ester.ee/record=b2355998*est https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-85030703057&origin=inward&txGid=6d5138d857744249210be10ac751f148 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2017 https://www.webofscience.com/wos/woscc/full-record/WOS:000396591200010
• Minimal realizations of nonlinear systemsKotta, Ülle; Moog, Claude; Tõnso, MarisAutomatica2018 / p. 207-212 https://doi.org/10.1016/j.automatica.2018.05.007 https://www.scopus.com/sourceid/24909 https://www.scopus.com/record/display.uri?eid=2-s2.0-85047724688&origin=inward&txGid=fd9e996b7522a7ea841bfb48dd2aa142 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=AUTOMATICA&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000441853900022
• The minimal time-varying realization of a nonlinear time-invariant system?Kotta, Ülle; Moog, Claude H.; Tõnso, Maris9th IFAC Symposium on Nonlinear Control Systems 2013 : Toulouse, France, 4 - 6 September 20132013 / p. 518 - 523 https://doi.org/10.3182/20130904-3-FR-2041.00080 https://www.scopus.com/sourceid/21100456158 https://www.scopus.com/record/display.uri?eid=2-s2.0-84885804720&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.3182%2F20130904-3-FR-2041.00080%29&sessionSearchId=b54b8b263198aa2b467a2e833e85bb3b
• Nabla derivatives associated with nonlinear control systems on homogeneous time scalesBartosiewicz, Zbigniew; Kotta, Ülle; Mullari, Tanel; Tõnso, Maris; Pawluszewicz, Ewa; Wyrwas, MałgorzataNonlinear analysis : modelling and control2016 / p. 547-563 https://doi.org/10.15388/NA.2016.4.8 https://www.scopus.com/sourceid/17700155806 https://www.scopus.com/record/display.uri?eid=2-s2.0-84963574794&origin=inward&txGid=708713c5b2cf40f232b80b4b44249447 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=NONLINEAR%20ANAL-MODEL&year=2016 https://www.webofscience.com/wos/woscc/full-record/WOS:000375346800008
• NLControl - a mathematica package for nonlinear control systemsKotta, Ülle; Tõnso, MarisIFAC-PapersOnLine2017 / p. 681-686 https://doi.org/10.1016/j.ifacol.2017.08.122 https://www.scopus.com/sourceid/21100456158 https://www.scopus.com/record/display.uri?eid=2-s2.0-85031766989&origin=inward&txGid=bb386f1b561b7772a9d1ba928440e326 https://www.webofscience.com/wos/woscc/full-record/WOS:000423845200111
• On accessibility conditions for state space nonlinear control systems on homogeneous time scalesBartosiewicz, Zbigniew; Kotta, Ülle; Mullari, Tanel; Tõnso, Maris; Wyrwas, MałgorzataSystems & control letters2016 / p. 8-13 https://doi.org/10.1016/j.sysconle.2016.09.018 https://www.scopus.com/sourceid/25563 https://www.scopus.com/record/display.uri?eid=2-s2.0-84994578253&origin=inward&txGid=267af40897615b2f6dc6e9199b2add1f https://jcr.clarivate.com/jcr-jp/journal-profile?journal=SYST%20CONTROL%20LETT&year=2016 https://www.webofscience.com/wos/woscc/full-record/WOS:000390499500002
• On the transformation of a nonlinear discrete-time input-output system into the strong row-reduced formBartosiewicz, Zbigniew; Belikov, Juri; Kotta, Ülle; Tõnso, Maris; Wyrwas, MałgorzataProceedings of the Estonian Academy of Sciences2016 / p. 220-236 https://doi.org/10.3176/proc.2016.3.02 https://artiklid.elnet.ee/record=b2798394*est https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-84985920442&origin=inward&txGid=e157cb232365b58f0421fc1788970acf https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2016 https://www.webofscience.com/wos/woscc/full-record/WOS:000383313700004
• Polynomial accessibility condition for the multi-input multi-output nonlinear control systemKotta, Ülle; Tõnso, Maris; Kawano, YuProceedings of the Estonian Academy of Sciences2014 / p. 136-150 https://artiklid.elnet.ee/record=b2673962*est https://doi.org/10.3176/proc.2014.2.04 https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-84901276730&origin=inward&txGid=6b14f0e2cde49b413823488d7b602839 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2014 https://www.webofscience.com/wos/woscc/full-record/WOS:000337664000004
• Popov form and the explicit equations of inverse systemsBartosiewicz, Zbigniew; Kotta, Ülle; Pawluszewicz, Ewa; Tõnso, Maris; Wyrwas, MałgorzataProceedings of the Estonian Academy of Sciences2018 / p. 432-355 : ill http://www.kirj.ee/public/proceedings_pdf/2018/issue_4/proc-2018-4-342-355.pdf https://doi.org/10.3176/proc.2018.4.04 https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-85060904949&origin=inward&txGid=b55a86ba1f2a1f232ff32d86073146ee https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000450486100006
• Port-Hamiltonian framework in power systems domain : a surveyTõnso, Maris; Kaparin, Vadim; Belikov, JuriEnergy Reports2023 / p. 2918 - 2930 https://doi.org/10.1016/j.egyr.2023.09.077 https://www.scopus.com/sourceid/21100389511 https://www.scopus.com/record/display.uri?eid=2-s2.0-85172694962&origin=resultslist&sort=plf-f&src=s&sid=d3179e9427b784eb52d784243f66386f&sot=b&sdt=b&s=TITLE-ABS-KEY%28%22Port-Hamiltonian+framework+in+power+systems+domain%3A+A+survey%22%29&sl=127&sessionSearchId=d3179e9427b784eb52d784243f66386f&relpos=0 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=ENERGY%20REP&year=2023 https://www.webofscience.com/wos/woscc/full-record/WOS:001088947900001
• Realisation of linear time-varying systemsKotta, Ülle; Tõnso, MarisInternational journal of control2017 / p. 1951-1956 https://doi.org/10.1080/00207179.2016.1230891 https://www.scopus.com/sourceid/12342 https://www.scopus.com/record/display.uri?eid=2-s2.0-84988411854&origin=inward&txGid=51507be6a15b4d2e56246a009769204a https://jcr.clarivate.com/jcr-jp/journal-profile?journal=INT%20J%20CONTROL&year=2023 https://www.webofscience.com/wos/woscc/full-record/WOS:000404245200013
• Realization of discrete-time nonlinear input-output equations : polynomial approachKotta, Ülle; Tõnso, MarisAutomatica2012 / p. 255-262 https://www.sciencedirect.com/science/article/pii/S0005109811005413
• Realization of nonlinear input-output equations using polynomial approach : preliminary ideasKotta, Ülle; Tõnso, MarisInfo- ja kommunikatsioonitehnoloogia doktorikooli IKTDK kolmanda aastakonverentsi artiklite kogumik : 25.-26. aprill 2008, Voore külalistemaja2008 / p. 21-24
• Realization of nonlinear MIMO system on homogeneous time scalesBelikov, Juri; Kotta, Ülle; Tõnso, MarisEuropean journal of control2015 / p. 48-54 https://doi.org/10.1016/j.ejcon.2015.01.006 https://www.scopus.com/sourceid/25406 https://www.scopus.com/record/display.uri?eid=2-s2.0-84929191540&origin=inward&txGid=21783f57b0ed4d487a08ff76850983b3 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=EUR%20J%20CONTROL&year=2015 https://www.webofscience.com/wos/woscc/full-record/WOS:000355027000006
• Realization of nonlinear time-delay input–output equationsKaldmäe, Arvo; Kotta, Ülle; Tõnso, MarisIEEE Control Systems Letters2018 / p. 369-374 https://doi.org/10.1109/LCSYS.2018.2838456 https://www.scopus.com/sourceid/21100885366 https://www.scopus.com/record/display.uri?eid=2-s2.0-85057643619&origin=inward&txGid=291d07de794a79cd26ff1eacc38f3845
• Reducibility condition for nonlinear discrete-time systems : behavioral approachBartosiewicz, Zbigniew; Kotta, Ülle; Pawłuszewicz, Ewa; Tõnso, Maris; Wyrwas, MałgorzataControl and Cybernetics2013 / p. 329-346 https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=d858f3fd9c2acd98e41f35a0bed4c0cb9efab59c https://www.scopus.com/sourceid/12928 https://www.scopus.com/record/display.uri?eid=2-s2.0-84884601138&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=cl&cluster=scoprefnameauid%2C%22Bartosiewicz%2C+Z.%2317344905000%22%2Ct&s=SRCTITLE%28%22Control+and+Cybernetics%22%29&sessionSearchId=bbca0492eaf03e2d41554a3d809caf85&relpos=1
• Relaxing realizability conditions for discrete-time nonlinear systemsKotta, Ülle; Schlahter, Kurt; Tõnso, MarisAutomatica2015 / p. 67-71 http://dx.doi.org/10.1016/j.automatica.2015.05.007
• Remarks on the realization of time-varying systemsKotta, Ülle; Moog, Claude; Tõnso, MarisProceedings of the Estonian Academy of Sciences2018 / p. 208-216 http://www.kirj.ee/public/proceedings_pdf/2018/issue_3/proc-2018-3-207-216.pdf https://doi.org/10.3176/proc.2018.3.02 https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-85052676202&origin=inward&txGid=cd2b53377abc38bc1b71402773576ef4 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000443380000002
• Removing the input derivatives in the generalized bilinear state equationsMullari, Tanel; Kotta, Ülle; Kotta, Palle; Tõnso, Maris; Zinober, AlanProceedings of the Estonian Academy of Sciences2009 / 2, p. 98-107 https://citeseerx.ist.psu.edu/document?repid=rep1&type=pdf&doi=b053956e3600449843044b1022ebefc6d5d19df8
• State-space realization of nonlinear control systems : unification and extension via pseudo-linear algebraBelikov, Juri; Kotta, Ülle; Tõnso, MarisKybernetika2012 / p. 1100-1113 https://www.researchgate.net/publication/269024076_State-space_realization_of_nonlinear_control_systems_Unification_and_extension_via_pseudo-linear_algebra
• Static state feedback linearizability : relationship between two methodsMullari, Tanel; Kotta, Ülle; Tõnso, MarisProceedings of the Estonian Academy of Sciences2011 / 2, p. 121-135 https://artiklid.elnet.ee/record=b2413961*est
• Static state feedback linearization of nonlinear control systems on homogeneous time scalesBartosiewicz, Zbigniew; Kotta, Ülle; Tõnso, Maris; Wyrwas, MałgorzataMathematics of control, signals, and systems2015 / p. 523-550 https://doi.org/10.1007/s00498-015-0150-5 https://www.scopus.com/sourceid/19202 https://www.scopus.com/record/display.uri?eid=2-s2.0-84944512820&origin=inward&txGid=9b38bece7861755df3cac410456fb525 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=MATH%20CONTROL%20SIGNAL&year=2015 https://www.webofscience.com/wos/woscc/full-record/WOS:000363060000004
• The connection between different static state feedback linearizability conditions of discrete time nonlinear control systemsMullari, Tanel; Kotta, Ülle; Tõnso, MarisProceedings of the European Control Conference 2007, Kos, Greece, July 2-5, 20072007 / p. 4268−4275 http://ieeexplore.ieee.org/document/7068444/
• The strong Popov form of nonlinear input–output equationsBartosiewicz, Zbigniew; Pawluszewicz, Ewa; Wyrwas, Małgorzata; Kotta, Ülle; Tõnso, MarisProceedings of the Estonian Academy of Sciences2018 / p. 193–206 https://doi.org/10.3176/proc.2018.3.01 https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-85052690894&origin=inward&txGid=d88c4ecefcc3cd05ce583eb9b8cd5c04 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000443380000001
• WebMathematica-based tools for discrete-time nonlinear control systemsTõnso, Maris; Rennik, Heli; Kotta, ÜlleProceedings of the Estonian Academy of Sciences2009 / 4, p. 224-240