Linearization by generalized input-output injections on homogeneous time scalesCiulkin, Monika; Pawluszewicz, Ewa; Kaparin, Vadim; Kotta, Ülle2016 21st International Conference on Methods and Models in Automation and
Robotics (MMAR 2016) : Miedzyzdroje, Poland, 29 August - 1 September 20162016 / p. 48-53 https://doi.org/10.1109/MMAR.2016.7575086

Linearization by input-output injections on homogeneous time scalesCiulkin, Monika; Kaparin, Vadim; Kotta, Ülle; Pawluszewicz, EwaProceedings of the Estonian Academy of Sciences2014 / p. 387-397 https://artiklid.elnet.ee/record=b2707375*est

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 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

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

Tensor series expansion of a spherical function for the use in constitutive theory of materials containing orientable particlesHerrmann, Heiko; Beddig, MiriamProceedings of the Estonian Academy of Sciences2018 / p. 73-92 : ill https://doi.org/10.3176/proc.2018.1.04 http://www.ester.ee/record=b2355998*est Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Transformation of nonlinear discrete-time state equations into the observer form : extension to non-reversible caseMullari, Tanel; Kotta, ÜlleProceedings of the Estonian Academy of Sciences2021 / p. 235-247 https://doi.org/10.3176/proc.2021.3.03 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Transformation of nonlinear discrete-time state equations into the observer form : revisionMullari, Tanel; Kotta, ÜlleProceedings of the Estonian Academy of Sciences2023 / p. 1-5 https://doi.org/10.3176/proc.2023.1.01

Transformation of nonlinear state equations into observer form = Mittelineaarsete olekuvõrrandite olekutaastaja kujule teisendamineKaparin, Vadim2013 https://www.ester.ee/record=b2998616*est

Transformation of nonlinear state equations into the observer form : necessary and sufficient conditions in terms of one-formsKaparin, Vadim; Kotta, ÜlleKybernetika2015 / p. 36-58 http://dx.doi.org/10.14736/kyb-2015-1-0036