MathSciDoc: An Archive for Mathematician ∫

@inproceedings{gustaf1892sur,
  title={Sur les maxima et les minima des intégrales doubles},
  author={Gustaf Kobb},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108202954496721968},
  booktitle={Acta Mathematica},
  volume={16},
  number={1},
  pages={65-140},
  year={1892},
}