@inproceedings{erik1977state,
title={State spaces of Jordan algebras},
author={Erik M. Alfsen, and Frederic W. Shultz},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203245724187236},
booktitle={Acta Mathematica},
volume={140},
number={1},
pages={155-190},
year={1977},
}