@inproceedings{j.1981some,
title={Some remarks on Banach spaces in which martingale difference sequences are unconditional},
author={J. Bourgain},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203515070976390},
booktitle={Arkiv for Matematik},
volume={21},
number={1},
pages={163-168},
year={1981},
}
J. Bourgain. Some remarks on Banach spaces in which martingale difference sequences are unconditional. 1981. Vol. 21. In Arkiv for Matematik. pp.163-168. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203515070976390.