@article{NUMA_1959__1_131434,
     author = {S.V. PARTER},
     title = {On },
     journal = {Numerische Mathematik},
     pages = {240--252},
     publisher = {mathdoc},
     volume = {1},
     year = {1959},
     zbl = {0094.31201},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1959__1_131434/}
}