@article{DAN_1986_290_6_a9,
     author = {S. G. Saakyan},
     title = {Waves in inhomogeneous elastic media},
     journal = {Doklady Akademii Nauk},
     pages = {1324--1327},
     year = {1986},
     volume = {290},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_290_6_a9/}
}