@inproceedings{pavel2010spectrum,
title={Spectrum of Dirichlet Laplacian in a conical layer},
author={Pavel Exner, and Milo Tater},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020130008829322633},
booktitle={Journal of Physics A: Mathematical and Theoretical},
volume={43},
number={47},
pages={474023},
year={2010},
}
Pavel Exner, and Milo Tater. Spectrum of Dirichlet Laplacian in a conical layer. 2010. Vol. 43. In Journal of Physics A: Mathematical and Theoretical. pp.474023. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020130008829322633.