@inproceedings{chung-wen2012rank,
title={RANK PRESERVING IN INTEGRAL EXTENSIONS OF COMMUTATIVE C^*-ALGEBRAS},
author={Chung-Wen Tsai, and Ngai-Ching Wong},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020213547687932301},
booktitle={Taiwanese Journal of Mathematics},
volume={16},
number={2},
pages={545-553},
year={2012},
}

Chung-Wen Tsai, and Ngai-Ching Wong. RANK PRESERVING IN INTEGRAL EXTENSIONS OF COMMUTATIVE C^*-ALGEBRAS. 2012. Vol. 16. In Taiwanese Journal of Mathematics. pp.545-553. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191020213547687932301.