TY  - JOUR
AU  - Dietrich Braess
TI  - On the Number of Best Approximation in Certain Non-linear Families of Functions.
JO  - Aequationes mathematicae
PY  - 1975
SP  - 184
EP  - 199
VL  - 12
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/AM2_1975__12_136508/
ID  - AM2_1975__12_136508
ER  -