%0 Journal Article %A B. A. Kats %T A method for estimating the number of linearly independent solutions of boundary value problems %J Trudy seminara po kraevym zadačam %D 1976 %P 120-127 %V 13 %N 13 %I mathdoc %U http://geodesic.mathdoc.fr/item/KUKZ_1976_13_13_a13/ %G ru %F KUKZ_1976_13_13_a13