1. Hollow modules and local endomorphism rings
2. F. Kasch, Modules and Rings, Academic Press, Inc-London, 1982.
3. X. Zhou and X. R. Zhang, “Small-Essential Submodules Morita and Duality”, SoutheastAsian Bulletin of Mathematics, 35, 1051–1062, 2011.
4. R. Beyranvand and F. Moradi, “small submodule with respect to an arbitrary submodule”, Journal of Algebra and Related Topcs Vol.3, No 2, (2015), P 43–51.
5. I.M.A. Hadi and S.H. Aidi, “On e-Small Submodules”, Ibn Al-Haitham Journal for Pure and Applied Science, 2015.