@inproceedings{m1975matrix,
title={Matrix canonical realizations of the Lie algebra o(m, n). I. Basic formul and classification},
author={M Havlek, and Pavel Exner},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020131622844666681},
booktitle={Annales de l'IHP Physique thorique},
volume={23},
number={4},
pages={335-347},
year={1975},
}
M Havlek, and Pavel Exner. Matrix canonical realizations of the Lie algebra o(m, n). I. Basic formul and classification. 1975. Vol. 23. In Annales de l'IHP Physique thorique. pp.335-347. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020131622844666681.