@article{IM2_1975_9_1_a6,
     author = {V. S. Buslaev},
     title = {On the asymptotic behavior of the spectral characteristics of exterior problems for the {Schr\"odinger} operator},
     journal = {Izvestiya. Mathematics },
     pages = {139--223},
     publisher = {mathdoc},
     volume = {9},
     number = {1},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1975_9_1_a6/}
}