@inproceedings{jános1972every,
title={Every sequence converging to$O$weakly in$L$_{$2$}contains an unconditional convergence sequence},
author={János Komlós},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203452753905198},
booktitle={Arkiv for Matematik},
volume={12},
number={1},
pages={41-49},
year={1972},
}
János Komlós. Every sequence converging to$O$weakly in$L$_{$2$}contains an unconditional convergence sequence. 1972. Vol. 12. In Arkiv for Matematik. pp.41-49. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203452753905198.