%0 Journal Article %A O. A. Oleinik %A E. V. Radkevich %T Estimates for the eigenfunctions and solutions of certain systems of partial differential equations that depend on a parameter %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1973 %V 28 %N 4 %U http://geodesic.mathdoc.fr/item/RM_1973_28_4_a20/ %G ru %F RM_1973_28_4_a20