Team, S. (2007). Some Transformation Semigroups Admitting Nearing Structure: Ng. Danpattanamongkon, P. Udomkavanich, Y. Kemprasit. Thai Journal of Mathematics, 5(3), 1–9. Retrieved from https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/97