@article{NUMA_1993__65_4_133733,
     author = {Yongzhong Song},
     title = {Some comparison theorems for nonnegative splittings of matrices.},
     journal = {Numerische Mathematik},
     pages = {245--252},
     publisher = {mathdoc},
     volume = {65},
     number = {4},
     year = {1993},
     zbl = {0803.65035},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1993__65_4_133733/}
}