[[1] Baer R. Groups without proper isomorphic quotient groups. Bull. A.M.S. 50 (1944), 267- 277.10.1090/S0002-9904-1944-08134-2]Search in Google Scholar
[[2] Calugareanu G. Morphic Abelian Groups. Journal of Algebra and Applications 9, no. 2 (2010), 185 - 193.10.1142/S0219498810003835]Search in Google Scholar
[[3] Ehrlich G. Units and one-sided units in regular rings, Trans. A. M. S. 216 (1976), 81 - 90.10.1090/S0002-9947-1976-0387340-0]Search in Google Scholar
[[4] Fuchs L. On quasi-injective modules. Ann. Scuola Norm. Sup. Pisa (3) 23 (1969), 541- 546.]Search in Google Scholar
[[5] Fuchs L. Infinite abelian groups. Vol. II. Pure and Applied Mathematics. Vol. 36-II. New York-London, Academic Press (1973).]Search in Google Scholar
[[6] Fuchs L., Kertesz A., Szele T. Abelian groups in which every serving subgroup is a direct summand. Publ. Math. Debrecen 3 (1953), 95 - 105]Search in Google Scholar
[[7] Lam T. Y. A Crash Course on Stable Range, Cancellation, Substitution, and Exchange. J. Algebra Appl. 3 (2004), 301 - 343.10.1142/S0219498804000897]Search in Google Scholar
[[8] Nicholson W. K., Sanchez Campos E. Rings with the dual of the isomorphism theorem. J of Algebra 271 (2004), 391 - 406.]Search in Google Scholar
[[9] Nicholson W. K., Sanchez Campos E. Principal rings with the dual of the isomorphism theorem. Glasgow M. J. 46 (2004), 181-191.]Search in Google Scholar
[[10] Nicholson W. K., Sanchez Campos E. Morphic Modules. Comm. in Algebra 33 (2005), 2629 - 2647.]Search in Google Scholar
[[11] Li Y., Nicholson W.K., Zan L. Morphic groups. Journal of Pure and Applied Algebra, 214, Issue 10 (2010), 1827-1834.]Search in Google Scholar
[[12] Varadarajan K. Hopfian and co-Hopfian objects. Publ. Mat. 36 (1) (1992), 293 - 317.10.5565/PUBLMAT_36192_21]Search in Google Scholar
[[13] Warfield R. B. Cancellation of modules and groups and stable range of endomorphism rings. Pacific J. Math. 91, (2) (1980), 457 - 485. 10.2140/pjm.1980.91.457]Search in Google Scholar