@inproceedings{p.1931ein,
title={Ein Approximationssatz für die Fuchsschen Gruppen},
author={P. J. Myrberg},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203058355273481},
booktitle={Acta Mathematica},
volume={57},
number={1},
pages={389-409},
year={1931},
}