Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1992_323_5_a9, author = {V. A. Sharafutdinov}, title = {Quasi-isotropic approximation of geometric optics, and tomography}, journal = {Doklady Akademii Nauk}, pages = {847--850}, publisher = {mathdoc}, volume = {323}, number = {5}, year = {1992}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1992_323_5_a9/} }
V. A. Sharafutdinov. Quasi-isotropic approximation of geometric optics, and tomography. Doklady Akademii Nauk, Tome 323 (1992) no. 5, pp. 847-850. http://geodesic.mathdoc.fr/item/DAN_1992_323_5_a9/