@article{TMF_1987_71_2_a8,
     author = {O. B. Zaslavskii and V. V. Ulyanov},
     title = {Periodic effective potentials for spin systems and new exact solutions of the one-dimensional {Schr\"odinger} equation for the energy bands},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {260--271},
     publisher = {mathdoc},
     volume = {71},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1987_71_2_a8/}
}