@inproceedings{harold1968overconvergence,
title={Overconvergence of sequences of rational functions with sparse poles},
author={Harold S. Shapiro},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203440099931092},
booktitle={Arkiv for Matematik},
volume={7},
number={4},
pages={343-349},
year={1968},
}
Harold S. Shapiro. Overconvergence of sequences of rational functions with sparse poles. 1968. Vol. 7. In Arkiv for Matematik. pp.343-349. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203440099931092.