Algebraic approach for analysis and control of a water tank systemBelikov, Juri; Kotta, Ülle; Tepljakov, AlekseiInformation technology and control2016 / p. 175-183 : ill https://doi.org/10.5755/j01.itc.45.2.13212 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Algebraic conditions for accessibility of discrete-time nonlinear control systemsBartosiewicz, Zbigniew; Kaldmäe, Arvo; Kotta, Ülle; Wyrwas, MałgorzataIEEE Transactions on Automatic Control2025 / p. 2334-2345 https://doi.org/10.1109/TAC.2024.3476155 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

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

An algorithm to transform discrete-time state equations into the extended observer formKaldmäe, Arvo; Kotta, ÜlleAutomatica2024 / art. 111598 https://doi.org/10.1016/j.automatica.2024.111598 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Construction of flat outputs of nonlinear discrete-time systems in a geometric and an algebraic frameworkKolar, Bernd; Kaldmäe, Arvo; Schöberl, Markus; Kotta, Ülle; Schlacher, KurtIFAC-PapersOnLine2016 / p. 796-801 https://doi.org/10.1016/j.ifacol.2016.10.263 Conference Proceedings at Scopus Article at Scopus Article at WOS

Feedback linearization of possibly non-smooth systemsKaldmäe, Arvo; Kotta, Ülle; Shumsky, Alexey; Zhirabok, AlexeyProceedings of the Estonian Academy of Sciences2017 / p. 109-123 https://doi.org/10.3176/proc.2017.2.01 http://www.ester.ee/record=b2355998*est https://artiklid.elnet.ee/record=b2820923*est Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Input–output linearization of discrete-time systems by dynamic output feedbackKaldmäe, Arvo; Kotta, ÜlleEuropean journal of control2014 / p. 73-78 https://doi.org/10.1016/j.ejcon.2013.12.004 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Integrability for nonlinear time-delay systemsKaldmäe, Arvo; Califano, Claudia; Moog, ClaudeIEEE transactions on automatic control2016 / p. 1912-1917 https://doi.org/10.1109/TAC.2015.2482003 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Minimal realizations of nonlinear time-delay systemsKaldmäe, Arvo; Zbigniew, Bartosiewicz; Kotta, Ülle; Wyrwas, MalgorzataIEEE transactions on automatic control2023 / p. 6766 - 6772 https://doi.org/10.1109/TAC.2023.3240124 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Observability of nonlinear control systems with disturbancesKaldmäe, Arvo13th IFAC Symposium on Nonlinear Control Systems, NOLCOS 2025, Reykjavík, Iceland, July 23-25 20252025 / p. 567-572 : ill https://doi.org/10.1016/j.ifacol.2025.11.095 Conference proceeding at Scopus Article at Scopus Article at WOS

Observer-based residual generation for nonlinear discrete-time systemsKaldmäe, Arvo; Kotta, ÜlleProceedings of the Estonian Academy of Sciences2018 / p. 325-336 https://doi.org/10.3176/proc.2018.4.01 http://www.kirj.ee/public/proceedings_pdf/2018/issue_4/proc-2018-4-325-336.pdf Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Realization of nonlinear input-output equations in controller canonical formKaldmäe, Arvo; Kotta, ÜlleKybernetika2018 / p. 736-747 https://doi.org/10.14736/kyb-2018-4-0736 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS