Critical point theory and Hamiltonian systems
Jean Mawhin, Michel Willem.
New York : Springer-Verlag, ©1989.
xiv, 277 págs. ; 25 cm.
Serie: Applied mathematical sciences ; v. 74
ISBN: 038796908X
Bibliografía: p. [240]-274.
Reseña: MathSciNet, 90e:58016