@inproceedings{alexander2002projections,
title={Projections in the space$H$^{∞}and the corona theorem for subdomains of coverings of finite bordered Riemann surfaces},
author={Alexander Brudnyi},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203609949260832},
booktitle={Arkiv for Matematik},
volume={42},
number={1},
pages={31-59},
year={2002},
}

Alexander Brudnyi. Projections in the space$H$^{∞}and the corona theorem for subdomains of coverings of finite bordered Riemann surfaces. 2002. Vol. 42. In Arkiv for Matematik. pp.31-59. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203609949260832.