D. K. SHIRLEY GLORIA; S. DEVI; K. NIRMALA. Regular string-token Petri nets. Malaya Journal of Matematik, India, v. 8, n. 02, p. 445–449, 2020. DOI: 10.26637/MJM0802/0019. Disponível em: https://www.malayajournal.org/index.php/mjm/article/view/1423. Acesso em: 4 dec. 2024.