@inproceedings{pavel2001potential,
title={Potential approximations to ': an inverse Klauder phenomenon with norm-resolvent convergence},
author={Pavel Exner, Hagen Neidhardt, and Valentin A Zagrebnov},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020122532283522562},
booktitle={Communications in Mathematical Physics},
volume={224},
number={3},
pages={593-612},
year={2001},
}
Pavel Exner, Hagen Neidhardt, and Valentin A Zagrebnov. Potential approximations to ': an inverse Klauder phenomenon with norm-resolvent convergence. 2001. Vol. 224. In Communications in Mathematical Physics. pp.593-612. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020122532283522562.