@article{DAN_1992_326_3_a11,
     author = {V. A. Sharafutdinov},
     title = {On the problem of emission tomography for nonhomogeneous media},
     journal = {Doklady Akademii Nauk},
     pages = {446--448},
     publisher = {mathdoc},
     volume = {326},
     number = {3},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_326_3_a11/}
}