Todorova, M. and Birov, D. (1996) “Algorithm of construction of the type and its realization in the language W”, Ann. Sofia Univ. Fac. Math. and Inf, 88, pp. 459–483. Available at: https://stipendii.uni-sofia.bg/index.php/fmi/article/view/400 (Accessed: 21 November 2024).