@inproceedings{w.1980subspaces,
title={Subspaces and quotients of$l$_{$p$}$⊕l$_{2}and$X$_{$p$}},
author={W. B. Johnson, and E. Odell},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203255554295304},
booktitle={Acta Mathematica},
volume={147},
number={1},
pages={117-147},
year={1980},
}
W. B. Johnson, and E. Odell. Subspaces and quotients of$l$_{$p$}$⊕l$_{2}and$X$_{$p$}. 1980. Vol. 147. In Acta Mathematica. pp.117-147. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203255554295304.