@inproceedings{friedrich1916über,
title={Über lineare Funktionalgleichungen},
author={Friedrich Riesz},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203032731571280},
booktitle={Acta Mathematica},
volume={41},
number={1},
pages={71-98},
year={1916},
}