@inproceedings{erik1967on,
title={On the Dirichlet problem of the Choquet boundary},
author={Erik M. Alfsen},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203214320108052},
booktitle={Acta Mathematica},
volume={120},
number={1},
pages={149-159},
year={1967},
}