Offor, Paschal Udoka, et al. “The Embedding of Category of Type A Monoid into Inverse Semigroup Categories With Their Translational Hulls”. Faculty of Natural and Applied Sciences Journal of Mathematical and Statistical Computing, vol. 2, no. 2, Mar. 2025, pp. 91-102, https://fnasjournals.com/index.php/FNAS-JMSC/article/view/788.