@inproceedings{yuan2012rigidity,
title={Rigidity for local holomorphic isometric embeddings from $\mathbb{B}^n$ into $\mathbb{B}^{N_1} × • • • × \mathbb{B}^{N_m}$ up to conformal factors},
author={Yuan Yuan, and Yuan Zhang},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160913223953816570917},
booktitle={Journal of Differential Geometry},
volume={90},
number={2},
pages={329-349},
year={2012},
}

Yuan Yuan, and Yuan Zhang. Rigidity for local holomorphic isometric embeddings from $\mathbb{B}^n$ into $\mathbb{B}^{N_1} × • • • × \mathbb{B}^{N_m}$ up to conformal factors. 2012. Vol. 90. In Journal of Differential Geometry. pp.329-349. http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20160913223953816570917.