Napaporn Chunse และ Manoj Siripitukdet. (2014) A natural partial order and sandwich sets on regular T-semigroups. Naresuan University:ม.ป.ท.Napaporn Chunse และ Manoj Siripitukdet. 2014. A natural partial order and sandwich sets on regular T-semigroups. ม.ป.ท.:Naresuan University;Napaporn Chunse และ Manoj Siripitukdet. A natural partial order and sandwich sets on regular T-semigroups. ม.ป.ท.:Naresuan University, 2014. Print.