@article{TIMM_2018_24_2_a5,
     author = {D. I. Borisov},
     title = {Gaps in the spectrum of the {Laplacian} in a band with periodic delta interaction},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {46--53},
     year = {2018},
     volume = {24},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2018_24_2_a5/}
}