Limpapat Bussaban และ Thawhat Changphas. (2016) On (m, n)-ideals and (m, n)-regular ordered semigroups. <i>Songklanakarin Journal of Science and Technology (SJST)</i>, <i>38</i>(2), 199-206.Limpapat Bussaban และ Thawhat Changphas. "On (m, n)-ideals and (m, n)-regular ordered semigroups". Songklanakarin Journal of Science and Technology (SJST) 38 (2016):199-206.Limpapat Bussaban และ Thawhat Changphas. On (m, n)-ideals and (m, n)-regular ordered semigroups. Research and Development Office, Prince of Songkla University:ม.ป.ท. 2016.