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: https://am.ippt.pan.pl/index.php/am/article/view/v48p191. Acesso em: 7 dec. 2025.