@article{GDZPPN001164899, title = {Best Approximation with Respect to Nearby Norms.}, journal = {Numerische Mathematik}, volume = {6}, year = {1964}, pages = {103-105}, zbl = {0128.34302}, url = {http://dml.mathdoc.fr/item/GDZPPN001164899} }
KRIPKE, B.R. Best Approximation with Respect to Nearby Norms.. Numerische Mathematik, Tome 6 (1964) pp. 103-105. http://gdmltest.u-ga.fr/item/GDZPPN001164899/