@article{DAN_1993_333_4_a10,
     author = {V. A. Yurko},
     title = {An inverse problem for selfadjoint differential operators on the},
     journal = {Doklady Akademii Nauk},
     pages = {449--451},
     publisher = {mathdoc},
     volume = {333},
     number = {4},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_333_4_a10/}
}