TY  - JOUR
AU  - Z. Ditzian
TI  - Optimality of the range for which equivalence between
 certain measures of smoothness holds
JO  - Studia Mathematica
PY  - 2010
SP  - 271
EP  - 277
VL  - 198
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm198-3-6/
DO  - 10.4064/sm198-3-6
LA  - en
ID  - 10_4064_sm198_3_6
ER  -