Suchai Tanaiacdchawoot และ Sidney S. Mitchell. (1986) The difference ring and quotient semifields of a semiring. Chulalongkorn University.:ม.ป.ท.Suchai Tanaiacdchawoot และ Sidney S. Mitchell. 1986. The difference ring and quotient semifields of a semiring. ม.ป.ท.:Chulalongkorn University.;Suchai Tanaiacdchawoot และ Sidney S. Mitchell. The difference ring and quotient semifields of a semiring. ม.ป.ท.:Chulalongkorn University. 1986. Print.