@inproceedings{c.1966existence,
title={Existence and approximation theorems for solutions of complex analogues of boundary problems},
author={C. O. Kiselman},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203434859301048},
booktitle={Arkiv for Matematik},
volume={6},
number={3},
pages={193-207},
year={1966},
}
C. O. Kiselman. Existence and approximation theorems for solutions of complex analogues of boundary problems. 1966. Vol. 6. In Arkiv for Matematik. pp.193-207. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203434859301048.