- Cheng-Yi Zhang; Shuanghua Luo; Fengmin Xu; Chengxian Xu
*The eigenvalue distribution on Schur complement of nonstrictly diagonally dominant matrices and general H-matrices,*

Electron. J. Linear Algebra 18 (2009), 801-820. - Cheng-Yi Zhang, Yan Zhu, Shuanghua Luo, and Jicheng Li
*On generalized Schur complement of nonstrictly diagonally dominant matrices and general H-matrices.*

Electron. J. Linear Algebra 23 (2012) pp. 801-814.