%0 Journal Article %A I. T. Lozanovskaya %A Ya. S. Uflyand %T A class of problems in mathematical physics with a mixed eigenvalue spectrum %J Doklady Akademii Nauk %D 1965 %P 1005-1007 %V 164 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_164_5_a12/ %G ru %F DAN_1965_164_5_a12