©2013 National Research Council of Thailand
Pennapa Rungrattrakoon. 2003. Regularity and isomorphism theorems of some order-preserving transformation semigroups. Field of Study Mathematics, Chulalongkorn University;
Pennapa Rungrattrakoon. (2003) Regularity and isomorphism theorems of some order-preserving transformation semigroups . Chulalongkorn University/Bangkok.
Pennapa Rungrattrakoon. Regularity and isomorphism theorems of some order-preserving transformation semigroups. . Bangkok:Chulalongkorn University, 2003.
Pennapa Rungrattrakoon. (2003) Regularity and isomorphism theorems of some order-preserving transformation semigroups . Chulalongkorn University/Bangkok.