@article{DAN_1976_228_5_a6,
     author = {V. A. Mikhailets},
     title = {Spectral asymptotics of boundary value problems for a {Sturm{\textendash}Liouville} operator equation},
     journal = {Doklady Akademii Nauk},
     pages = {1037--1040},
     year = {1976},
     volume = {228},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1976_228_5_a6/}
}