@inproceedings{karl-mikael2011duality,
title={Duality and distance formulas in spaces defined by means of oscillation},
author={Karl-Mikael Perfekt},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203635895163047},
booktitle={Arkiv for Matematik},
volume={51},
number={2},
pages={345-361},
year={2011},
}

Karl-Mikael Perfekt. Duality and distance formulas in spaces defined by means of oscillation. 2011. Vol. 51. In Arkiv for Matematik. pp.345-361. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203635895163047.