TY  - RPRT
TI  - Linear and regular celestial mechanics- Perturbed two-body motion, numerical methods, canonical theory
AU  - Scheifele, G.
AU  - Stiefel, E. L.
PY  - 1971
UR  - https://ntrs.nasa.gov/citations/19710053774
ID  - 19710053774
ER  -