@article{NUMA_1982__38_132755,
     author = {R.S. Varga and D.Y. Cai},
     title = {On the {LU} {Factorization} of {M-Matrices.}},
     journal = {Numerische Mathematik},
     pages = {179--192},
     year = {1982},
     volume = {38},
     zbl = {0477.65021},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1982__38_132755/}
}