1. Remarks on principal ideal rings;Amitsur, Shimshon A.;Osaka Math. J.,1963
2. Noncommutative unique factorization domains;Cohn, P. M.;Trans. Amer. Math. Soc.,1963
3. Reflective 𝑁-prime rings with the ascending chain condition;Feller, E. H.;Trans. Amer. Math. Soc.,1961
4. Noetherian modules and noetherian injective rings;Feller, Edmund H.;Tohoku Math. J. (2),1965
5. A. W. Goldie, Lecture notes, Yale Univ., New Haven, Conn., 1961.