@article{NUMA_1985__46_133000,
     author = {G. M\"uhlbach},
     title = {Two {Composition} {Methods} for {Solving} {Certain} {Systems} of {Linear} {Equations.}},
     journal = {Numerische Mathematik},
     pages = {339--350},
     publisher = {mathdoc},
     volume = {46},
     year = {1985},
     zbl = {0568.65021},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1985__46_133000/}
}