@article{NUMA_1987__51_133188,
     author = {Michael Neumann and Stuart Nelson},
     title = {Generalizations of the {Projection} {Method} with {Applications} to {SOR} {Theory} for {Hermitian} {Positive} {Semidefinite} {Linear} {Systems.}},
     journal = {Numerische Mathematik},
     pages = {123--142},
     publisher = {mathdoc},
     volume = {51},
     year = {1987},
     zbl = {0628.65024},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1987__51_133188/}
}