@article{DAN_1987_297_2_a1,
     author = {A. B. Aliev},
     title = {Unilateral problems for quasilinear hyperbolic operators in function spaces},
     journal = {Doklady Akademii Nauk},
     pages = {271--275},
     publisher = {mathdoc},
     volume = {297},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_297_2_a1/}
}