@article{DAN_1984_275_4_a4,
     author = {E. M. Landis},
     title = {The dependence of classes of uniqueness of solution of the second},
     journal = {Doklady Akademii Nauk},
     pages = {790--793},
     year = {1984},
     volume = {275},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_275_4_a4/}
}