%0 Journal Article %A V. I. Ruderfer %T On the zeros of solutions of a~linear analytic partial differential equation of arbitrary order %J Sbornik. Mathematics %D 1980 %P 403-410 %V 37 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1980_37_3_a7/ %G en %F SM_1980_37_3_a7