@article{DAN_1957_114_3_a3,
     author = {A. B. Drapkin},
     title = {Asymptotic expressions for eigenvalues and characteristic functions of a class of elliptical systems},
     journal = {Doklady Akademii Nauk},
     pages = {465--467},
     publisher = {mathdoc},
     volume = {114},
     number = {3},
     year = {1957},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_114_3_a3/}
}