Oam Sthityanak และ Paisan Nakmahachalasint. (2007) Stabilities of a 3-dimensional sine functional equation. Chulalongkorn University:ม.ป.ท.Oam Sthityanak และ Paisan Nakmahachalasint. 2007. Stabilities of a 3-dimensional sine functional equation. ม.ป.ท.:Chulalongkorn University;Oam Sthityanak และ Paisan Nakmahachalasint. Stabilities of a 3-dimensional sine functional equation. ม.ป.ท.:Chulalongkorn University, 2007. Print.