@article{DAN_1991_321_1_a14,
     author = {A. Sakabekov},
     title = {On the existence of a global solution of an initial-boundary value},
     journal = {Doklady Akademii Nauk},
     pages = {75--78},
     publisher = {mathdoc},
     volume = {321},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_321_1_a14/}
}