@inproceedings{christer1951on,
title={On the coefficients in the power series expansion of a rational function with an application on analytic continuation},
author={Christer Lech},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203412063803855},
booktitle={Arkiv for Matematik},
volume={1},
number={4},
pages={341-346},
year={1951},
}
Christer Lech. On the coefficients in the power series expansion of a rational function with an application on analytic continuation. 1951. Vol. 1. In Arkiv for Matematik. pp.341-346. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203412063803855.