%0 Journal Article %A D.-P. Covei %T Existence theorems for a~class of systems involving two quasilinear operators %J Izvestiya. Mathematics %D 2019 %P 49-64 %V 83 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM2_2019_83_1_a2/ %G en %F IM2_2019_83_1_a2