Watchara Khuntavichai และ Ajchara Harnchoowong. (2007) Factors of quotient rings over some quadratic integer rings. Chulalongkorn University:ม.ป.ท.Watchara Khuntavichai และ Ajchara Harnchoowong. 2007. Factors of quotient rings over some quadratic integer rings. ม.ป.ท.:Chulalongkorn University;Watchara Khuntavichai และ Ajchara Harnchoowong. Factors of quotient rings over some quadratic integer rings. ม.ป.ท.:Chulalongkorn University, 2007. Print.