TY  - JOUR
AU  - M.R. OSBORNE
AU  - G.A. WATSON
TI  - On Estimating Best Approximations of Functions Defined by Differential Equations.
JO  - Numerische Mathematik
PY  - 1969
SP  - 199
EP  - 206
VL  - 13
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/NUMA_1969__13_131910/
ID  - NUMA_1969__13_131910
ER  -