@article{MZM_1977_22_5_a9,
     author = {A. N. Kozhevnikov},
     title = {Separate asymptotics of two series of eigenvalues for a~single elliptic boundary-value problem},
     journal = {Matemati\v{c}eskie zametki},
     pages = {699--710},
     publisher = {mathdoc},
     volume = {22},
     number = {5},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_22_5_a9/}
}