MathSciDoc: An Archive for Mathematician ∫

@inproceedings{j.1941mass-,
  title={Mass- und Integrationstheorie in Strukturen},
  author={J. Ridder},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203116818947624},
  booktitle={Acta Mathematica},
  volume={73},
  number={1},
  pages={131-173},
  year={1941},
}