Advances in non-commutative ring theory.Advances in non-commutative ring theory; (12th : 1981)：proceedings of the twelfth george H. Hudson symposium. Plattsburgh, 1981.Springer-Verlag,1982.
Bernard R. McDonald,Algebra and Ring Theory Conference.Algebra and Ring Theory Conference ( 3rd : 1979 : University of OKlahoma )：Ring theory and algebra．Ⅲ.Marcel Dekker, Inc.,1980.
