@inproceedings{wenhuithe,
title={The novel classes of finite dimensional filters with non-maximal rank estimation algebra on state dimension four and rank of one },
author={Wenhui Dong, Xiuqiong Chen, and Stephen S.-T. Yau},
url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20200425062657342683633},
}
Wenhui Dong, Xiuqiong Chen, and Stephen S.-T. Yau. The novel classes of finite dimensional filters with non-maximal rank estimation algebra on state dimension four and rank of one . http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20200425062657342683633.