1. Alcune osservazioni sugli anelli pseudo-bezoutiani e fattoriali;Boccioni, D.;Rend. Sem. Mat. Univ. Padova,1967
2. Actualit\'{e}s Scientifiques et Industrielles [Current Scientific and Industrial Topics], No. 1314;Bourbaki, N.,1965
3. Bezout rings and their subrings;Cohn, P. M.;Proc. Cambridge Philos. Soc.,1968
4. R. Dedekind, Über einen arithmetischen Satz von Gauss, Mitt. Deutsch. Math. Ges., Prague, 1892, pp. 1-11; Gesammelte Werke XXII. Vol. 2.
5. Queen's Papers in Pure and Applied Mathematics, No. 12;Gilmer, Robert W.,1968