Oam Sthityanak. 2007. Stabilities of a 3-dimensional sine functional equation. Field of Study Mathematics, Chulalongkorn University;
Oam Sthityanak. (2007) Stabilities of a 3-dimensional sine functional equation . Chulalongkorn University/Bangkok.
Oam Sthityanak. Stabilities of a 3-dimensional sine functional equation. . Bangkok:Chulalongkorn University, 2007.
Oam Sthityanak. (2007) Stabilities of a 3-dimensional sine functional equation . Chulalongkorn University/Bangkok.