When $\delta$-semiperfect rings are semiperfect
  Zhou defined $\delta$-semiperfect rings as a proper generalization of semiperfect rings. The purpose of this paper is to discuss relative notions of supplemented modules and to show that the semiperfect rings are precisely the semilocal rings which are $\delta$-supplemented. Module theoretic version of our results are obtained. 
Engin B\"uy\"uka\c{s}{\i}k and Christian Lomp