A transfer function approach to the realisation problem of nonlinear systemsHalas, Miroslav; Kotta, ÜlleInternational journal of control2012 / p. 320-331 Algebraic necessary and sufficient condition for difference flatnessKaldmäe, ArvoInternational Journal of Control2021 / 8 p https://doi.org/10.1080/00207179.2021.1908598 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Comments on 'A new kind of nonlinear disturbance observer for nonlinear systemswith applications to cruise control of air-breathing hypersonic vehicles'Kaldmäe, Arvo; Kotta, ÜlleInternational journal of control2020 / p. 1725 https://doi.org/10.1080/00207179.2018.1529436 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Degree of Dieudonne determinant defines the order of nonlinear systemKotta, Ülle; Belikov, Juri; Halas, Miroslav; Leibak, AlarInternational journal of control2019 / p. 518-527 https://doi.org/10.1080/00207179.2017.1361042 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Experimental validation of the Newton observer for a nonlinear flux-controlled AMB system operated with zero-bias fluxMystkowski, Arkadiusz; Kierdelewicz, A.; Kotta, Ülle; Kaparin, VadimInternational journal of control2020 / p. 2257-2266 : ill https://doi.org/10.1080/00207179.2018.1552025 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Extended observer form : simple existence conditionsKaparin, Vadim; Kotta, Ülle; Mullari, TanelInternational journal of control2013 / p. 794-803 : ill Fixed-order stabilising controller design by a mixed randomised/deterministic methodNurges, Ülo; Avanessov, SergeiInternational journal of control2015 / p. 335-346 http://dx.doi.org/10.1080/00207179.2014.953208 On the finiteness of accessibility test for nonlinear discrete-time systemsSarafrazi, Mohammad Amin; Pawluszewicz, Ewa; Bartosiewicz, Zbigniew; Kotta, ÜlleInternational journal of control2021 / p. 2330-2336 https://doi.org/10.1080/00207179.2019.1706102 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Realisation of linear time-varying systemsKotta, Ülle; Tõnso, MarisInternational journal of control2017 / p. 1951-1956 https://doi.org/10.1080/00207179.2016.1230891 Transformation of nonlinear discrete-time system into the extended observer formKaparin, Vadim; Kotta, ÜlleInternational journal of control2018 / p. 848-858 https://doi.org/10.1080/00207179.2017.1294264 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS Weak reachability and controllability of discrete-time nonlinear systems: generic approach and singular pointsMullari, Tanel; Kotta, Ülle; Bartosiewicz, Zbigniew; Sarafrazi, Mohammad Amin; Moog, Claude; Pawluszewicz, EwaInternational journal of control2020 / p. 483-489 https://doi.org/10.1080/00207179.2018.1479076 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS