@inproceedings{lei-hong2014maximization,
title={Maximization of the sum of the trace ratio on the Stiefel manifold, I: Theory},
author={Lei-Hong Zhang, and Ren-Cang Li},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20190424161752659745269},
booktitle={SCIENCE CHINA Mathematics},
year={2014},
}
Lei-Hong Zhang, and Ren-Cang Li. Maximization of the sum of the trace ratio on the Stiefel manifold, I: Theory. 2014. In SCIENCE CHINA Mathematics. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20190424161752659745269.