@inproceedings{b.1987poles,
title={Poles of |$f$($z,w$)|^{2$s$}and roots of the$B$-function},
author={B. Lichtin},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203530616291519},
booktitle={Arkiv for Matematik},
volume={27},
number={1},
pages={283-304},
year={1987},
}