@article{TRSPY_1981_158_a13,
     author = {M. M. Skriganov},
     title = {Structure of the spectrum of a~two-dimensional {Schr\"odinger} operator with periodic potential and some arithmetic properties of two-dimensional lattices},
     journal = {Informatics and Automation},
     pages = {163--174},
     publisher = {mathdoc},
     volume = {158},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TRSPY_1981_158_a13/}
}