@inproceedings{christian2019the,
title={The asymptotic zero-counting measure of iterated derivaties of a class of meromorphic functions},
author={Christian Hägg},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191204133325086816587},
booktitle={Arkiv for Matematik},
volume={57},
number={1},
pages={107-120},
year={2019},
}

Christian Hägg. The asymptotic zero-counting measure of iterated derivaties of a class of meromorphic functions. 2019. Vol. 57. In Arkiv for Matematik. pp.107-120. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191204133325086816587.