BOJKOVA, E. An example of a finite number of recursively enumerable $m$-degrees containing an infinite sequence of recursively enumerable sets. Ann. Sofia Univ. Fac. Math. and Inf., [S. l.], v. 87, p. 223–234, 1995. Disponível em: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/415. Acesso em: 22 nov. 2024.