%0 Journal Article %A E. B. Dynkin %T Martin boundaries and non-negative solutions of a~boundary value problem with a~directional derivative %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1964 %P 1-48 %V 19 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1964_19_5_a0/ %G en %F RM_1964_19_5_a0