Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{NUMA_1969__13_131910, author = {M.R. OSBORNE and G.A. WATSON}, title = {On {Estimating} {Best} {Approximations} of {Functions} {Defined} by {Differential} {Equations.}}, journal = {Numerische Mathematik}, pages = {199--206}, publisher = {mathdoc}, volume = {13}, year = {1969}, zbl = {0174.47302}, url = {http://geodesic.mathdoc.fr/item/NUMA_1969__13_131910/} }
M.R. OSBORNE; G.A. WATSON. On Estimating Best Approximations of Functions Defined by Differential Equations.. Numerische Mathematik, Tome 13 (1969), pp. 199-206. http://geodesic.mathdoc.fr/item/NUMA_1969__13_131910/