Somphong Lerwongrat. 1997. Text compression by sorting transformation. Bangkok:Mahidol University;
Somphong Lerwongrat. (1997) Text compression by sorting transformation (รายงานผลงานวิจัย). Mahidol University:Bangkok.
Somphong Lerwongrat. Text compression by sorting transformation. Bangkok:Mahidol University, 1997.
Somphong Lerwongrat. (1997) Text compression by sorting transformation (รายงานผลงานวิจัย). Mahidol University:Bangkok.