@article{FAA_1977_11_1_a8,
     author = {M. M. Gekhtman and I. V. Stankevich},
     title = {The generalized {Kronig--Penney} problem},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {61--62},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1977_11_1_a8/}
}