@article{DE_1981_17_12_a15,
     author = {M. M. Gekhtman and I. V. Stankevich},
     title = {Investigation of spectral characteristics of some {Sturm--Liouville} operators used in crystal theory},
     journal = {Differencialʹnye uravneni\^a},
     pages = {2269--2270},
     publisher = {mathdoc},
     volume = {17},
     number = {12},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1981_17_12_a15/}
}