@article{FAA_1988_22_3_a4,
     author = {Yu. G. Safarov},
     title = {Asymptotic of the spectral function of a positive elliptic operator without the nontrap condition},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {53--65},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1988_22_3_a4/}
}