@inproceedings{p.1971asymptotic,
title={Asymptotic behaviour of eigen functions on a semisimple Lie group: The discrete spectrum},
author={P. C. Trombi, and V. S. Varadarajan},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203226503540139},
booktitle={Acta Mathematica},
volume={129},
number={1},
pages={237-280},
year={1971},
}
P. C. Trombi, and V. S. Varadarajan. Asymptotic behaviour of eigen functions on a semisimple Lie group: The discrete spectrum. 1971. Vol. 129. In Acta Mathematica. pp.237-280. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203226503540139.