@inproceedings{robert1977expansions,
title={Expansions for spherical functions on noncompact symmetric spaces},
author={Robert J. Stanton, and Peter A. Tomas},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203246033117238},
booktitle={Acta Mathematica},
volume={140},
number={1},
pages={251-276},
year={1977},
}
Robert J. Stanton, and Peter A. Tomas. Expansions for spherical functions on noncompact symmetric spaces. 1977. Vol. 140. In Acta Mathematica. pp.251-276. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203246033117238.