@article{TMF_1986_68_1_a1,
     author = {S. N. Naboko},
     title = {Dense point spectra of {Schr\"odinger} and {Dirac} operators},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {18--28},
     publisher = {mathdoc},
     volume = {68},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1986_68_1_a1/}
}