@article{MZM_1996_59_4_a0,
     author = {A. B. Aliev and A. Kh. Khanmamedov},
     title = {Energy estimates for solutions of the mixed problem for linear second-order hyperbolic equations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {483--488},
     publisher = {mathdoc},
     volume = {59},
     number = {4},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1996_59_4_a0/}
}