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@article{KUKZ_1990_25_25_a0, author = {F. G. Avkhadiev}, title = {Metrics with variable density, and inverse boundary value problems}, journal = {Trudy seminara po kraevym zada\v{c}am}, pages = {3--23}, publisher = {mathdoc}, volume = {25}, number = {25}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/KUKZ_1990_25_25_a0/} }
F. G. Avkhadiev. Metrics with variable density, and inverse boundary value problems. Trudy seminara po kraevym zadačam, Trudy Seminara po Kraevym Zadacham, Tome 25 (1990) no. 25, pp. 3-23. http://geodesic.mathdoc.fr/item/KUKZ_1990_25_25_a0/