Knograt Savettaseranee. 1991. Linear transformation semigroups which have proper dense subsemigroups and linear transformation semigroups which are closed in some standard extensions. Bangkok:Chulalongkorn University;
Knograt Savettaseranee. (1991) Linear transformation semigroups which have proper dense subsemigroups and linear transformation semigroups which are closed in some standard extensions (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.
Knograt Savettaseranee. Linear transformation semigroups which have proper dense subsemigroups and linear transformation semigroups which are closed in some standard extensions. Bangkok:Chulalongkorn University, 1991.
Knograt Savettaseranee. (1991) Linear transformation semigroups which have proper dense subsemigroups and linear transformation semigroups which are closed in some standard extensions (รายงานผลงานวิจัย). Chulalongkorn University:Bangkok.