• Algebraic formalism of differential p-forms and vector fields for nonlinear control systems on homogeneous time scalesBartosiewicz, Zbigniew; Kotta, Ülle; Pawluszewicz, Ewa; Tõnso, Maris; Wyrwas, MałgorzataProceedings of the Estonian Academy of Sciences2013 / p. 215-226 https://doi.org/10.3176/proc.2013.4.02 https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-84887841347&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.3176%2Fproc.2013.4.02%29&sessionSearchId=f124baea23c7e59a88234b4350eaca80 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2013 https://www.webofscience.com/wos/woscc/full-record/WOS:000327478600002
  • On the differentiation of a composite function with a generalized vector argument on homogeneous time scalesKaparin, Vadim; Kotta, ÜlleProceedings of the Estonian Academy of Sciences2017 / p. 309-322 : tab https://doi.org/10.3176/proc.2017.3.04 http://www.ester.ee/record=b2355998*est https://artiklid.elnet.ee/record=b2824309*est https://www.scopus.com/sourceid/11500153303 https://www.scopus.com/record/display.uri?eid=2-s2.0-85028311987&origin=inward&txGid=ce24d0c320ad3e7aa5d00d0e87a6e630 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=P%20EST%20ACAD%20SCI&year=2017 https://www.webofscience.com/wos/woscc/full-record/WOS:000408394600008