@article{DAN_1993_330_5_a4,
     author = {S. A. Iskhokov},
     title = {The distribution of eigenvalues of some classes of nonselfadjoint},
     journal = {Doklady Akademii Nauk},
     pages = {549--553},
     publisher = {mathdoc},
     volume = {330},
     number = {5},
     year = {1993},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1993_330_5_a4/}
}