@article{IVM_1986_8_a11,
     author = {V. A. Sochneva and V. R. Fridlender},
     title = {A generalization of the {Goursat} problem},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {63--70},
     publisher = {mathdoc},
     number = {8},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1986_8_a11/}
}