Team, Support. “Green’s Relations and Regularity for Semigroups of Transformations With Restricted Range That Preserve Double Direction Equivalence Relations: Utsithon Chaichompoo, Kritsada Sangkhanan”. Thai Journal of Mathematics (November 22, 2019). Accessed December 22, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/853.