TY  - BOOK
AU  - Ziemer William P
TI  - Weakly differentiable functions:  Sobolev spaces and functions of bounded variation.   
T2  - Graduate Texts in Mathematics, 120
SN  - 0387970177
U1  - B466, M9 
PY  - 1989///
CY  - New York 
PB  -  Springer-Verlag         
KW  - Economics
ER  -