Journal of Pure and Applied Algebra · 1983 · 49 citations · 13 references
13
P. M. Cohn · Bulletin of the London Mathematical Society · 1974 · 1.1K citations
Fred Richman · Proceedings of the American Mathematical Society · 1965 · 144 citations · Full text
David E. Dobbs · Pacific Journal of Mathematics · 1976 · 138 citations · Full text