%0 Journal Article %A O. A. Oleinik %T The Cauchy problem and a boundary value problem for hyperbolic equations of the second order degenerating in the region and on its boundary %J Doklady Akademii Nauk %D 1966 %P 525-528 %V 169 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1966_169_3_a8/ %G ru %F DAN_1966_169_3_a8