@article{TMF_2012_171_1_a4,
     author = {G. M. Zhislin},
     title = {Discrete spectrum of {Hamiltonians} of some quantum system models},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {44--64},
     year = {2012},
     volume = {171},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2012_171_1_a4/}
}