Cheranoot Somboonkulavudi และ Ajchara Harnchoowong. (2011) Pythagorean triples over number filelds. Chulalongkorn University:ม.ป.ท.Cheranoot Somboonkulavudi และ Ajchara Harnchoowong. 2011. Pythagorean triples over number filelds. ม.ป.ท.:Chulalongkorn University;Cheranoot Somboonkulavudi และ Ajchara Harnchoowong. Pythagorean triples over number filelds. ม.ป.ท.:Chulalongkorn University, 2011. Print.