@article{GDZPPN001166123, title = {On a Theorem of Koenig.}, journal = {Numerische Mathematik}, volume = {9}, year = {1966}, pages = {465-468}, zbl = {0143.17102}, url = {http://dml.mathdoc.fr/item/GDZPPN001166123} }
HOUSEHOLDER, A.S.; GRAGG, W.B. On a Theorem of Koenig.. Numerische Mathematik, Tome 9 (1966) pp. 465-468. http://gdmltest.u-ga.fr/item/GDZPPN001166123/