@article{ZNSL_2007_348_a3,
     author = {S. A. Nazarov},
     title = {On the concentration of the point spectrum on the
},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {98--126},
     publisher = {mathdoc},
     volume = {348},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2007_348_a3/}
}