@inproceedings{christopher1990representation,
title={Representation theoretic rigidity in PSL (2,R)},
author={Christopher Bishop, and Tim Steger},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203319501921480},
booktitle={Acta Mathematica},
volume={170},
number={1},
pages={121-149},
year={1990},
}
Christopher Bishop, and Tim Steger. Representation theoretic rigidity in PSL (2,R). 1990. Vol. 170. In Acta Mathematica. pp.121-149. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203319501921480.