@article{DAN_1957_113_1_a5,
     author = {V. B. Lidskii},
     title = {Conditions for a complete continuity of the resolvent of a differential operator},
     journal = {Doklady Akademii Nauk},
     pages = {28--31},
     year = {1957},
     volume = {113},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1957_113_1_a5/}
}