@inproceedings{pavel1999some,
title={Some properties of the one-dimensional generalized point interactions (a torso)},
author={Pavel Exner, and Harald Grosse},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020125456725957614},
booktitle={arXiv preprint math-ph/9910029},
year={1999},
}
Pavel Exner, and Harald Grosse. Some properties of the one-dimensional generalized point interactions (a torso). 1999. In arXiv preprint math-ph/9910029. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020125456725957614.