TY  - DATA
AU  - DeVore, Ronald A.
AU  - Sharpley, Robert C.,
TI  - Maximal functions measuring smoothness 
T2  - Memoirs of the American Mathematical Society, 
SN  - 9781470407032 (online)
PY  - 1984///
CY  - Providence, R.I., USA
PB  - American Mathematical Society
UR  - http://www.ams.org/memo/0293
ER  -