MARTYNYUK-CHERNIENKO, Yu. A. On the theory of stability of motion of a nonlinear system on a time scale. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 60, n. 6, p. 776–782, 2008. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3195. Acesso em: 6 dec. 2025.