TY  - BOOK
AU  - Boccaletti, D
AU  - Pucacco, G
TI  - Theory of orbits, V0l-2: Perturbative and geometrical methods
T2  - Astronomy and astrophysics library
SN  - 3540603557
U1  - 521.3 
PY  - 1999///
CY  - Berlin
PB  - Springer
ER  -