Separatrix surfaces and invariant manifolds of a class of integrable Hamiltonian systems and their perturbations /
Llibre, Jaume.
Nunes, Ana,1958-
Providence, R.I. : American Mathematical Society,
1994.
"January 1994, volume 107, number 513 (second of 4 numbers)."
Includes bibliographical references (p. 189-191).
Hamiltonian systems.
Perturbation (Mathematics)
Foliations (Mathematics)
Invariants.