Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{NUMA_1973__21_132213, author = {Philip M. Anselone and Joel Davis}, title = {Perturbations of {Best} {Approximation} {Problems.}}, journal = {Numerische Mathematik}, pages = {63--69}, publisher = {mathdoc}, volume = {21}, year = {1973}, zbl = {0264.65009}, url = {http://geodesic.mathdoc.fr/item/NUMA_1973__21_132213/} }
Philip M. Anselone; Joel Davis. Perturbations of Best Approximation Problems.. Numerische Mathematik, Tome 21 (1973), pp. 63-69. http://geodesic.mathdoc.fr/item/NUMA_1973__21_132213/