@article{DAN_1966_168_2_a6,
     author = {A. G. Kostyuchenko},
     title = {Asymptotic behavior of the spectral function of a singular differential operator of order $2m$},
     journal = {Doklady Akademii Nauk},
     pages = {276--279},
     publisher = {mathdoc},
     volume = {168},
     number = {2},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_168_2_a6/}
}