Rukchart Prasertpong. (2011) Characterization of completely regular elements in t-semigroups /. Naresuan University,:ม.ป.ท.Rukchart Prasertpong. 2011. Characterization of completely regular elements in t-semigroups /. ม.ป.ท.:Naresuan University,;Rukchart Prasertpong. Characterization of completely regular elements in t-semigroups /. ม.ป.ท.:Naresuan University, 2011. Print.