@inproceedings{pavel2018gap,
title={Gap control by singular Schr\" odinger operators in a periodically structured metamaterial},
author={Pavel Exner, and Andrii Khrabustovskyi},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020135211827032793},
booktitle={arXiv preprint arXiv:1802.07522},
year={2018},
}
Pavel Exner, and Andrii Khrabustovskyi. Gap control by singular Schr\" odinger operators in a periodically structured metamaterial. 2018. In arXiv preprint arXiv:1802.07522. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020135211827032793.