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@article{DAN_1990_312_2_a18, author = {V. I. Zubov}, title = {The wave equation for an anisotropic medium}, journal = {Doklady Akademii Nauk}, pages = {342--345}, publisher = {mathdoc}, volume = {312}, number = {2}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1990_312_2_a18/} }
V. I. Zubov. The wave equation for an anisotropic medium. Doklady Akademii Nauk, Tome 312 (1990) no. 2, pp. 342-345. http://geodesic.mathdoc.fr/item/DAN_1990_312_2_a18/