Sampson, M. I., Z. . Lipcsey, E. . Akak, F. . Efiong, and M. . Essien. “Algorithm for Semigroup Bases I”. International Journal of Mathematical Analysis and Modelling, vol. 7, no. 1, July 2024, https://tnsmb.org/journal/index.php/ijmam/article/view/142.