@article{NUMA_1978__31_132579,
     author = {R.J. Plemmons and M. Neumann},
     title = {Convergent {Nonnegative} {Matrices} and {Iterative} {Methods} for {Consistent} {Linear} {Systems.}},
     journal = {Numerische Mathematik},
     pages = {265--280},
     year = {1978},
     volume = {31},
     zbl = {0372.65014},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1978__31_132579/}
}