@article{TMF_1985_65_3_a4,
     author = {A. S. Lyskova},
     title = {Topological characteristics of the spectrum of the {Schr\"odinger} operator in a~magnetic field and in a~weak potential},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {368--378},
     year = {1985},
     volume = {65},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1985_65_3_a4/}
}