• A brief tutorial overview of disturbance observers for nonlinear systems : application to flatness-based controlKaldmäe, Arvo; Kotta, ÜlleProceedings of the Estonian Academy of Sciences2020 / p. 57-73 : ill https://doi.org/10.3176/proc.2020.1.07 http://www.kirj.ee/33035/?tpl=1061&c_tpl=1064 https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-85079554256&origin=inward&txGid=90fdf02167c66520776651825affaf65 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2022 https://www.webofscience.com/wos/woscc/full-record/WOS:000519586800008