@inproceedings{thomas1976the,
title={The fundamental series of representations of a real semisimple Lie algebra},
author={Thomas J. Enright, and Nolan R. Wallach},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203244071840230},
booktitle={Acta Mathematica},
volume={140},
number={1},
pages={1-32},
year={1976},
}
Thomas J. Enright, and Nolan R. Wallach. The fundamental series of representations of a real semisimple Lie algebra. 1976. Vol. 140. In Acta Mathematica. pp.1-32. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203244071840230.