KOTOWSKI, S. Invariance of sliding motions with respect to control matrix. Archives of Mechanics, Warsaw, Poland, v. 48, n. 1, p. 191–198, 1996. DOI: 10.24423/aom.1336. Disponível em: http://am.ippt.gov.pl/index.php/am/article/view/v48p191. Acesso em: 17 jan. 2026.