@article{DAN_1994_336_5_a3,
     author = {M. A. Sadybekov},
     title = {A new type of boundary value problem for the wave equation},
     journal = {Doklady Akademii Nauk},
     pages = {590--591},
     year = {1994},
     volume = {336},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1994_336_5_a3/}
}