MathSciDoc: An Archive for Mathematician ∫

@inproceedings{gustaf1893sur,
  title={Sur les maxima et les minima des intégrales doubles},
  author={Gustaf Kobb},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108202956741800988},
  booktitle={Acta Mathematica},
  volume={17},
  number={1},
  pages={321-343},
  year={1893},
}