@article{FAA_1997_31_1_a5,
     author = {V. A. Geiler and M. M. Senatorov},
     title = {Periodic {Potentials} for {Which} {All} {Gaps} {Are} {Nontrivial}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {67--70},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1997_31_1_a5/}
}