@article{DAN_1985_285_6_a4,
     author = {N. Yu. Kapustin},
     title = {Generalized solvability in the class $L_2$ of the {Cauchy{\textendash}Goursat} problem for a degenerate hyperbolic equation},
     journal = {Doklady Akademii Nauk},
     pages = {1306--1309},
     year = {1985},
     volume = {285},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1985_285_6_a4/}
}