@inproceedings{jussi2013essential,
title={Essential spectrum of Schrdinger operators with interactions on the union of compact Lipschitz hypersurfaces},
author={Jussi Behrndt, Pavel Exner, and Vladimir Lotoreichik},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020132321580167703},
booktitle={PAMM},
volume={13},
number={1},
pages={523-524},
year={2013},
}
Jussi Behrndt, Pavel Exner, and Vladimir Lotoreichik. Essential spectrum of Schrdinger operators with interactions on the union of compact Lipschitz hypersurfaces. 2013. Vol. 13. In PAMM. pp.523-524. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020132321580167703.