1. Coverings of twisted Chevalley groups over commutative rings;Abe;Tokyo Kyoiku Daigaku (A),1977
2. Albert, A. (1939) Structure of Algebras, Amer. Math. Soc. Colloq. Publ. 24, Providence, R. I.
3. Infinite group-graded rings, rings of endomorphisms, and localization;Albu;J. Pure Appl. Algebra,1989
4. Rings and Categories of Modules;Anderson,1973
5. The Theory of Partitions;Andrews,1976