TY  - BOOK
AU  - Katok A
AU  -  Strelcyn J M
TI  - Invariant manifolds, entropy and bill iards, smoth maps with singularities
T2  - Lecture notes in mathematics; 1222
U1  - B331, M6 
PY  - 1986///
CY  - Berlin
PB  - Springer-Verlag         
KW  -  Ordinary differential equations
KW  - Mathematics
ER  -