TY  - BOOK
AU  - LANG Serge
TI  - Introduction to differentiable manifolds
T2  - Universitext
SN  - 0387954775
U1  - B316, P2 
PY  - 2002///
CY  - New York
PB  - Springer-Verlag         
KW  - Economics
N1  - Bibliography: P 243-248
ER  -