DENEVA, S. Particular movements of rolling sphere on absolutely rough tore. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 85, p. 131–141, 1993. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/461. Acesso em: 22 nov. 2024.