@article{JMAG_2018_14_3_a1,
     author = {Pavel Exner and Andrii Khrabustovskyi},
     title = {Gap control by singular {Schr\"odinger} operators in a periodically structured metamaterial},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {270--285},
     year = {2018},
     volume = {14},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2018_14_3_a1/}
}