@article{VCHGU_2011_14_a3,
     author = {A. M. Golovina},
     title = {The discrete spectrum of operators with two distant perturbations},
     journal = {Vestnik Chelyabinskogo Gosudarstvennogo Universiteta. Matematika, Mekhanika, Informatika},
     pages = {37--45},
     publisher = {mathdoc},
     number = {14},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VCHGU_2011_14_a3/}
}