Ditchev, A. (2004) “SOME RESULTS ON THE UPPER-SEMILATTICE OF R.E. $m$-DEGREES INSIDE A SINGLE R.E. $tt$-DEGREE”, Ann. Sofia Univ. Fac. Math. and Inf, 96, pp. 23–34. Available at: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/158 (Accessed: 21 November 2024).