TY - BOOK AU - Nastasescu,C. AU - Nastasescu,C. AU - Oystaeyen,F.van TI - Graded ring theory SN - 044486489X PY - 1982/// CY - Amsterdam, New York, New York PB - North-Holland Pub. Co., Sole distributors for the U.S.A. and Canada, Elsevier Science Pub. Co. KW - Graded rings KW - Noncommutative rings N1 - Includes index ER -