Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{NUMA_1964__6_131598, author = {B.R. KRIPKE}, title = {Best {Approximation} with {Respect} to {Nearby} {Norms.}}, journal = {Numerische Mathematik}, pages = {103--105}, publisher = {mathdoc}, volume = {6}, year = {1964}, zbl = {0128.34302}, url = {http://geodesic.mathdoc.fr/item/NUMA_1964__6_131598/} }
B.R. KRIPKE. Best Approximation with Respect to Nearby Norms.. Numerische Mathematik, Tome 6 (1964), pp. 103-105. http://geodesic.mathdoc.fr/item/NUMA_1964__6_131598/