Radensky, A. and Djambazova, M. (1992) “Schemes for recursion elimination in Backus’ FP-Systems”, Ann. Sofia Univ. Fac. Math. and Inf, 83(1), pp. 39–49. Available at: https://admin.uni-sofia.bg/index.php/fmi/article/view/484 (Accessed: 16 January 2025).