@inproceedings{josip2003a,
title={A decomposition of functions with zero means on circles},
author={Josip Globevnik},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203615051106872},
booktitle={Arkiv for Matematik},
volume={43},
number={2},
pages={383-393},
year={2003},
}

Josip Globevnik. A decomposition of functions with zero means on circles. 2003. Vol. 43. In Arkiv for Matematik. pp.383-393. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203615051106872.