• On stable cones of polynomials via reduced Routh parametersNurges, Ülo; Belikov, Juri; Artemtšuk, IgorKybernetika2016 / p. 461-477 https://doi.org/10.14736/kyb-2016-3-0461 https://www.scopus.com/sourceid/24449 https://www.scopus.com/record/display.uri?eid=2-s2.0-84979555751&origin=inward&txGid=0a0e18d97a3656a0e98b3b78d3815a1f https://jcr.clarivate.com/jcr-jp/journal-profile?journal=KYBERNETIKA&year=2016 https://www.webofscience.com/wos/woscc/full-record/WOS:000380865100008
• 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 https://www.scopus.com/sourceid/24449 https://www.scopus.com/record/display.uri?eid=2-s2.0-85056195246&origin=inward&txGid=e5b53766de17abc339269f2690ebb23d https://jcr.clarivate.com/jcr-jp/journal-profile?journal=KYBERNETIKA&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000449579800006
• 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
• 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