MathSciDoc: An Archive for Mathematician ∫

@inproceedings{erling1963positive,
  title={Positive linear maps of operator algebras},
  author={Erling Størmer},
  url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203202697281965},
  booktitle={Acta Mathematica},
  volume={110},
  number={1},
  pages={233-278},
  year={1963},
}