@article{ZNSL_1979_89_a12,
     author = {Ya. V. Kurylev},
     title = {The spectral function asymptotics for second order elliptic differential operator},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {152--203},
     publisher = {mathdoc},
     volume = {89},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1979_89_a12/}
}