%0 Journal Article %A H. Ugowski %T On integro-differential equations of parabolic and elliptic type %J Annales Polonici Mathematici %D 1969 %P 255-275 %V 22 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-22-3-255-275/ %R 10.4064/ap-22-3-255-275 %G en %F 10_4064_ap_22_3_255_275