TY  - JOUR
TI  - On the Problem of R. De Vore
JO  - Canadian mathematical bulletin
PY  - 1974
SP  - 39
EP  - 44
VL  - 17
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-007-8/
DO  - 10.4153/CMB-1974-007-8
ID  - 10_4153_CMB_1974_007_8
ER  -