@inproceedings{jan1978equivalence,
title={Equivalence of generalized moduli of continuity},
author={Jan Boman},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203507829746329},
booktitle={Arkiv for Matematik},
volume={18},
number={1},
pages={73-100},
year={1978},
}