• Remarks on the realization of time-varying systemsKotta, Ülle; Moog, Claude; Tõnso, MarisProceedings of the Estonian Academy of Sciences2018 / p. 208-216 http://www.kirj.ee/public/proceedings_pdf/2018/issue_3/proc-2018-3-207-216.pdf https://doi.org/10.3176/proc.2018.3.02 https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-85052676202&origin=inward&txGid=cd2b53377abc38bc1b71402773576ef4 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000443380000002