@article{DAN_1989_309_4_a16,
     author = {B. R. Zavalishin},
     title = {Accuracy of focusing in seismic imaging},
     journal = {Doklady Akademii Nauk},
     pages = {835--837},
     year = {1989},
     volume = {309},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1989_309_4_a16/}
}