@article{NUMA_1972__19_132132,
     author = {J.L. Brenner and J. de Pillis},
     title = {Partitioned {Matrices} and {Seidel} {Convergence.}},
     journal = {Numerische Mathematik},
     pages = {76--80},
     publisher = {mathdoc},
     volume = {19},
     year = {1972},
     zbl = {0223.65009},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1972__19_132132/}
}