@article{IM2_1975_9_1_a5,
     author = {B. S. Pavlov},
     title = {On separation conditions for the spectral components of a~dissipative operator},
     journal = {Izvestiya. Mathematics},
     pages = {113--137},
     year = {1975},
     volume = {9},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1975_9_1_a5/}
}