@article{VUU_2014_2_a0,
     author = {L. I. Danilov},
     title = {On the spectrum of a two-dimensional generalized periodic {Schr\"{o}dinger} operator. {II}},
     journal = {Vestnik Udmurtskogo universiteta. Matematika, mehanika, kompʹ\^uternye nauki},
     pages = {3--28},
     publisher = {mathdoc},
     number = {2},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VUU_2014_2_a0/}
}