Todorova, Magdalina, and Dimitar Birov. “Algorithm of Construction of the Type and Its Realization in the Language W”. Ann. Sofia Univ. Fac. Math. and Inf. 88 (December 12, 1996): 459–483. Accessed November 21, 2024. https://stipendii.uni-sofia.bg/index.php/fmi/article/view/400.