TY  - BOOK
AU  - Petrushev P P
AU  -  Popov V A
TI  - Rational approximation of real functions
T2  - Encyclopedia of mathematics and its applications; 28
U1  - B37, M7;1 
PY  - 1987///
CY  - Cambridge
PB  - Cambridge University press       
KW  - Real variables
ER  -