GEORGIEV, K. Some problems of the robot control based on using changeable structures. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 88, p. 265–268, 1996. Disponível em: https://ftl5.uni-sofia.bg/index.php/fmi/article/view/385. Acesso em: 4 dec. 2024.