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2. Invariant factors and two criteria for projectivity of modules;Auslander, Maurice;Trans. Amer. Math. Soc.,1962
3. Maximal orders;Auslander, Maurice;Trans. Amer. Math. Soc.,1960
4. Actualit\'{e}s Scientifiques et Industrielles [Current Scientific and Industrial Topics], No. 1293;Bourbaki, N.,1961