Team, S. (2015). Factorisable Monoid of Generalized Hypersubstitutions of Type $\tau=(2)$: Ampika Boonmee, Sorasak Leeratanavalee. Thai Journal of Mathematics, 13(1), 213–225. Retrieved from https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/503