DŨNG, T. V. On the algebraic sematics of combinational programs. Journal of Computer Science and Cybernetics, [S. l.], v. 25, n. 4, p. 301–313, 2012. DOI: 10.15625/1813-9663/25/4/581. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/581. Acesso em: 5 may. 2024.