@article{DAN_1981_256_3_a2,
     author = {R. R. Ashurov and A. K. Pulatov},
     title = {Asymptotics of the spectral function of an elliptic operator with constant coefficients},
     journal = {Doklady Akademii Nauk},
     pages = {528--530},
     year = {1981},
     volume = {256},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1981_256_3_a2/}
}