%0 Journal Article %A S. P. Khairullina %T On certain Cauchy problems with initial data on a line of degeneracy %J Doklady Akademii Nauk %D 1965 %P 1027-1029 %V 161 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1965_161_5_a7/ %G ru %F DAN_1965_161_5_a7