@inproceedings{d2002geometric,
title={Geometric coupling thresholds in a two-dimensional strip},
author={D Borisov, Pavel Exner, and R Gadylshin},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020122716099621568},
booktitle={Journal of Mathematical Physics},
volume={43},
number={12},
pages={6265-6278},
year={2002},
}

D Borisov, Pavel Exner, and R Gadylshin. Geometric coupling thresholds in a two-dimensional strip. 2002. Vol. 43. In Journal of Mathematical Physics. pp.6265-6278. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020122716099621568.