@article{DAN_1983_271_2_a6,
     author = {S. Z. Levendorskii},
     title = {The method of approximate spectral projection as a general method for proving the classical formula for the asymptotic behavior of a spectrum},
     journal = {Doklady Akademii Nauk},
     pages = {287--291},
     publisher = {mathdoc},
     volume = {271},
     number = {2},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1983_271_2_a6/}
}