@article{DAN_1973_213_1_a11,
     author = {S. P. Shishatskii},
     title = {A priori estimates in the problem of extending a wave field from a cylindrical time-like surface},
     journal = {Doklady Akademii Nauk},
     pages = {49--50},
     publisher = {mathdoc},
     volume = {213},
     number = {1},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_213_1_a11/}
}