@article{DAN_1978_241_3_a3,
     author = {K. Kh. Boimatov and A. G. Kostyuchenko},
     title = {The asymptotic behavior of {Riesz} means of the spectral function of an elliptic operator},
     journal = {Doklady Akademii Nauk},
     pages = {517--520},
     publisher = {mathdoc},
     volume = {241},
     number = {3},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1978_241_3_a3/}
}