@article{ELA_2009__18__a51,
     author = {Zhang, Cheng-Yi and Luo, Shuanghua and Xu, Chengxian and Jiang, Hongying},
     title = {Schur complements of generally diagonally dominant matrices and a criterion for irreducibility of matrices},
     journal = {The electronic journal of linear algebra},
     pages = {69--87},
     publisher = {mathdoc},
     volume = {18},
     year = {2009},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_2009__18__a51/}
}