THANH, H. C.; PROSZYNSKI, P. Composition of concurrency relations and marked simple nets. Journal of Computer Science and Cybernetics, [S. l.], v. 1, n. 2, p. 7–13, 2015. DOI: 10.15625/1813-9663/1/2/6673. Disponível em: https://vjs.ac.vn/index.php/jcc/article/view/6673. Acesso em: 4 may. 2024.