@misc{NUMA_1976__26_252000,
     title = {[unknown]},
     journal = {Numerische Mathematik},
     pages = {226--226},
     publisher = {mathdoc},
     volume = {26},
     year = {1976},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1976__26_252000/}
}