%0 Journal Article %A V. I. Kononenko %T Fundamental solutions of singular partial differential equations with variable coefficients %J Doklady Akademii Nauk %D 1967 %P 267-270 %V 172 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1967_172_2_a4/ %G ru %F DAN_1967_172_2_a4