@inproceedings{pavel1996band, title={Band spectra of rectangular graph superlattices}, author={Pavel Exner, and Ralf Gawlista}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020123120994078580}, booktitle={Physical Review B}, volume={53}, number={11}, pages={7275}, year={1996}, }