@inproceedings{pierre2008on,
title={On the spectrum of a bent chain graph},
author={Pierre Duclos, Pavel Exner, and Ondej Turek},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020125032060156603},
booktitle={Journal of Physics A: Mathematical and Theoretical},
volume={41},
number={41},
pages={415206},
year={2008},
}

Pierre Duclos, Pavel Exner, and Ondej Turek. On the spectrum of a bent chain graph. 2008. Vol. 41. In Journal of Physics A: Mathematical and Theoretical. pp.415206. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020125032060156603.