@inproceedings{mauricio2016rigidity,
title={Rigidity and characteristic classes of smooth bundles with nonpositively curved fibers},
author={Mauricio Bustamante, F. Thomas Farrell, and Yi Jiang},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220422152410866864108},
booktitle={Journal of Topology},
volume={9},
pages={934-956},
year={2016},
}
Mauricio Bustamante, F. Thomas Farrell, and Yi Jiang. Rigidity and characteristic classes of smooth bundles with nonpositively curved fibers. 2016. Vol. 9. In Journal of Topology. pp.934-956. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20220422152410866864108.