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

On integrability of observable space for discrete-time polynomial control systemsKawano, Yu; Kotta, ÜlleIEEE transactions on automatic control2015 / p. 1987-1991 https://doi.org/10.1109/TAC.2014.2365685 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Relaxing realizability conditions for discrete-time nonlinear systemsKotta, Ülle; Schlahter, Kurt; Tõnso, MarisAutomatica2015 / p. 67-71 https://doi.org/10.1016/j.automatica.2015.05.007 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS

Single-experiment observability decomposition of discrete-time analytic systemsKawano, Yu; Kotta, ÜlleSystems & control letters2016 / p. 193-199 https://doi.org/10.1016/j.sysconle.2016.09.016 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS