%0 Journal Article %A B. V. Melent'ev %T Uniqueness theorems for the solution of certain boundary-value problems for equations of mixed type %J Doklady Akademii Nauk %D 1962 %P 38-41 %V 143 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1962_143_1_a9/ %G ru %F DAN_1962_143_1_a9