ALGEBRA COLLOQUIUM, cilt.22, ss.727-738, 2015 (SCI-Expanded)
In this paper, the concepts of SGQ-projective, quasi-epi kappa-projective and quasi-epi kappa*-projective modules are introduced and some properties of these modules are investigated. Hopfian and co-Hopfian modules are investigated via quasi(-epi) kappa-projective and quasi(-epi) kappa*-projective modules.