@inproceedings{g.1973the,
title={The determinantal formula of Schubert calculus},
author={G. Kempf, and D. Laksov},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20170108203231350172164},
booktitle={Acta Mathematica},
volume={132},
number={1},
pages={153-162},
year={1973},
}