Comments on “When retarded nonlinear time-delay systems admit an input–output representation of neutral type” [Automatica 49 (2013) 561–567]Kaldmäe, ArvoAutomatica2023 / art. 110797, 2 p https://doi.org/10.1016/j.automatica.2022.110797 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

A note on observability of nonlinear discrete-time systemsKaldmäe, Arvo; Kotta, Ülle2023 62nd IEEE Conference on Decision and Control (CDC), Singapore, 13-15 December 20232023 / p. 7483-7488 https://doi.org/10.1109/CDC49753.2023.10383709 Conference proceedings at Scopus Article at Scopus 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

Observable space of the nonlinear control system on a homogeneous time scaleKaparin, Vadim; Kotta, Ülle; Wyrwas, MałgorzataProceedings of the Estonian Academy of Sciences2014 / p. 11-25 https://artiklid.elnet.ee/record=b2665198*est https://doi.org/10.3176/proc.2014.1.04 Journal metrics at Scopus Article at Scopus Journal metrics 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

On integrability of observable space for discrete-time analytic systemsKawano, Yu; Kotta, Ülle2015 54th IEEE Conference on Decision and Control (CDC) : date: 15-18 Dec. 20152015 / p. 7137 - 7142 https://doi.org/10.1109/CDC.2015.7403345 Conference Proceedings at Scopus Article at Scopus

On the stopping criteria in nonlinear unknown input observability conditionSarafrazi, Mohammad Amin; Kotta, Ülle; Bartosiewicz, ZbigniewIEEE transactions on automatic control2022 / p. 4733-4737 https://doi.org/10.1109/TAC.2022.3160133 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Optimal placement of branch PMUs for specified redundancy and line observabilityTuttelberg, Kaur; Kilter, Jako2015 IEEE Power & Energy Society General Meeting (PESGM 2015) : Denver, CO, USA, July 26-30, 20152015 / [5] p. : ill http://dx.doi.org/10.1109/PESGM.2015.7286453

A polynomial approach to nonlinear system accessibility and observabilityHalas, Miroslav; Kaldmäe, Arvo; Kotta, Ülle; Dodek, MartinIFAC-PapersOnLine2025 / p. 561-566 https://doi.org/10.1016/j.ifacol.2025.11.094 Conference proceedings at Scopus Article at Scopus Article at WOS

A tool set for teaching design-for-testability of digital circuitsKostin, Sergei; Orasson, Elmet; Ubar, Raimund-JohannesEWME 2016 : 11th European Workshop on Microelectronics Education : May 11-13, 2016, Southampton, UK2016 / [6] p. : ill https://doi.org/10.1109/EWME.2016.7496466