%0 Journal Article %A Ryszard Deszcz %T On four-dimensional Riemannian warped product manifolds satisfying certain pseudo-symmetry curvature conditions %J Colloquium Mathematicum %D 1991 %P 103-120 %V 62 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-62-1-103-120/ %R 10.4064/cm-62-1-103-120 %G en %F 10_4064_cm_62_1_103_120