TY  - JOUR
AU  - Z. Ditzian
AU  - S. Tikhonov
TI  - Moduli of smoothness of functions and their derivatives
JO  - Studia Mathematica
PY  - 2007
SP  - 143
EP  - 160
VL  - 180
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm180-2-4/
DO  - 10.4064/sm180-2-4
LA  - en
ID  - 10_4064_sm180_2_4
ER  -