@article{DAN_1993_330_2_a8,
     author = {A. I. Prilepko and I. A. Vasin},
     title = {A nonlinear inverse problem for determining the coefficient in a},
     journal = {Doklady Akademii Nauk},
     pages = {161--163},
     publisher = {mathdoc},
     volume = {330},
     number = {2},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_330_2_a8/}
}