1.
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. [Internet]. 1995 Dec. 12 [cited 2024 Nov. 23];87:223-34. Available from: https://annual.uni-sofia.bg/index.php/fmi/article/view/415