1.
D. K. Shirley Gloria, S. Devi, K. Nirmala. Regular string-token Petri nets. Malaya J. Mat. [Internet]. 2020 Apr. 1 [cited 2024 Dec. 4];8(02):445-9. Available from: https://www.malayajournal.org/index.php/mjm/article/view/1423