Schemes for recursion elimination in Backus’ FP-Systems. Annual of Sofia University St. Kliment Ohridski. Faculty of Mathematics and Informatics, [S. l.], v. 83, n. 1, p. 39–49, 1992. Disponível em: https://annual.uni-sofia.bg/index.php/fmi/article/view/484. Acesso em: 15 dec. 2025.