@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}, }