%0 Journal Article %A H. Ugowski %T Some theorems on the estimate and existence of solutions of integro-differential equations of parabolic type %J Annales Polonici Mathematici %D 1971 %P 311-323 %V 25 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-25-3-311-323/ %R 10.4064/ap-25-3-311-323 %G en %F 10_4064_ap_25_3_311_323