@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/}
}