@inproceedings{r.1975a,
title={A martingale that occurs in harmonic analysis},
author={R. F. Gundy, and N. Th. Varopoulos},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203458527164248},
booktitle={Arkiv for Matematik},
volume={14},
number={1},
pages={179-187},
year={1975},
}
R. F. Gundy, and N. Th. Varopoulos. A martingale that occurs in harmonic analysis. 1975. Vol. 14. In Arkiv for Matematik. pp.179-187. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203458527164248.