Ekkachai Laysirikul และผู้แต่งคนอื่นๆ. (2023) A Note on Regularity of Certain Semigroups of Transformations Preserving a Reflexive and Transitive Relation. <i>Science & Technology Asia</i>, <i>28</i>(3), 37-43.Ekkachai Laysirikul และผู้แต่งคนอื่นๆ. "A Note on Regularity of Certain Semigroups of Transformations Preserving a Reflexive and Transitive Relation". Science & Technology Asia 28 (2023):37-43.Ekkachai Laysirikul และผู้แต่งคนอื่นๆ. A Note on Regularity of Certain Semigroups of Transformations Preserving a Reflexive and Transitive Relation. Research Administration Division:ม.ป.ท. 2023.