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2. Murase's quasi-matrix rings and generalizations;Clark;Sci. Papers College Gen. Ed. Univ. Tokyo,1968
3. On the global dimension of skew polynomial rings;Fields;J. Algebra,1969
4. Rings with Maximum Conditions;Goldie,1964
5. The theory of rings;Jacobson;Amer. Math. Soc. Math. Surveys,1943