%0 Journal Article %A E. M. Landis %T Relationship between the growth of the solution of an elliptical equation and the number of its sign alternations %J Doklady Akademii Nauk %D 1958 %P 602-605 %V 123 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1958_123_4_a5/ %G ru %F DAN_1958_123_4_a5