@article{DAN_1988_298_3_a5,
     author = {A. Dzhuraev},
     title = {An initial-boundary value problem for the system $a(x)u_{tt}=a(x)\mathrm{grad}\,\mathrm{div}a(x)u+\mathrm{rot}\,\mathrm{rot}u+b(x)u$},
     journal = {Doklady Akademii Nauk},
     pages = {541--544},
     publisher = {mathdoc},
     volume = {298},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1988_298_3_a5/}
}