In this paper, we shall concern with the existence result of unilateral parabolic degenerated problems associated to the equations of the form
where A is a classical Leray-Lions operator acting from the weighted Sobolev space
into its dual Lp′ (0, T, W-1,p′ (Ω, w*)), while the datum f is assumed in L1(QT).The proof is based on the penalty methods.