1. Abyzov, A.N., Tuganbaev, A.A.: Retractable and coretractable modules. J. Math. Sci. (N.Y.) 213(2), 132–142 (2016)
2. Amini, B., Ershad, M., Sharif, H.: Coretractable modules. J. Aust. Math. Soc. 86, 289–304 (2009)
3. Anderson, F.W., Fuller, K.R.: Rings and Categories of Modules. Springer, New York (1974)
4. Clark, J., Lomp, C., Vanaja, N., Wisbauer, R.: Lifting Modules. Supplements and Projectivity in Module Theory, Frontiers in Mathematics. Birkhäuser, Berlin (2006)
5. Ecevit, Ş., Koşan, M.T.: On rings all of whose modules are retractable. Arch. Math. (Brno) 45, 71–74 (2009)