A. Cima, A. Gasull, F. Mañosas.
A note on LaSalle's problems.
Ann. Polon. Math., 76(01/02/09), 33-46. 2001. [DOI]
Abstract

A. Cima, J. Li, J. Llibre.
Periodic solutions of delay differential equations with two delay via bi-Hamiltonian systems.
Ann. Differential Equations, 17(3), 205-214. 2001.
Abstract

B. Coll, A. Gasull, R. Prohens.
Degenerate Hopf bifurcations in discontinuous planar systems.
J. Math. Anal. Appl., 253(2), 671-690. 2001. [DOI]
Abstract

M. Corbera, J. Llibre.
Periodic and quasi-periodic orbits for the spatial isosceles three-body problem.
In Third Conference on Celestial Mechanics (Valladolid, 2000), 37-44. Univ. Zaragoza, Zaragoza, 2001.
Abstract

J. M. Cors, C. Piñol, J. Soler.
Periodic solutions in the spatial elliptic restricted three-body problem.
Phys. D, 154(03/04/09), 195-206. 2001. [DOI]
Abstract

A. Gasull, J. Torregrosa.
A new approach to the computation of the Lyapunov constants.
Comput. Appl. Math., 20(1-2), 149-177. 2001. (Special issue in celebration of M. M. Peixoto's 80th birthday)
PreprintAbstract

A. Gasull, J. Torregrosa.
A new algorithm for the computation of the Lyapunov constants for some degenerated critical points.
Nonlinear Anal., 47(7), 4479-4490. 2001. [DOI]
PreprintAbstract

A. Gasull, J. Torregrosa.
A relation between small amplitude and big limit cycles.
Rocky Mountain J. Math., 31(4), 1277-1303. 2001. [DOI]
PreprintAbstract

H. Giacomini, J. Llibre, M. Viano.
The shape of limit cycles that bifurcate from non-Hamiltonian centers.
Nonlinear Anal., 43(7), 837-859. 2001. [DOI]
Abstract

J. Giné.
Analytic integrability of nilpotent cubic systems with degenerate infinity.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 11(8), 2299-2304. 2001.
Abstract

J. Giné, X. Santallusia.
On the Poincaré-Lyapunov constants and the Poincaré series.
Appl. Math. (Warsaw), 28(1), 17-30. 2001.

G. Gómez, J. Llibre, R. Martínez, C. Simó.
Dynamics and mission design near libration points. Vol. I: Fundamentals: The case of collinear libration points.
World Scientific Publishing Co. Inc., River Edge, NJ, 2001.
Link at publisherAbstract

G. Gómez, J. Llibre, R. Martínez, C. Simó.
Dynamics and mission design near libration points. Vol. II: Fundamentals: The case of triangular libration points.
World Scientific Publishing Co. Inc., River Edge, NJ, 2001.
Link at publisherAbstract

G. Gómez, J. M. Mondelo.
The dynamics around the collinear equilibrium points of the RTBP.
Phys. D, 157(4), 283-321. 2001.
Abstract

G. Gómez, J. M. Mondelo, C. Simó.
Refined Fourier analysis: procedures, error estimates and applications.
2001.
Abstract

X. Jarque, J. Llibre.
Polynomial foliations in $R^2$.
Pacific J. Math., 197(1), 53-72. 2001. [DOI]
Abstract

C. Li, W. Li, J. Llibre, Z. Zhang.
Linear estimate of the number of zeros of Abelian integrals for a class of integrable non-Hamiltonian systems.
Nonlinear Anal., 47(7), 4527-4531. 2001. [DOI]
Abstract

C. Li, W. Li, J. Llibre, Z. Zhang.
Polynomial systems: a lower bound for the weakened 16th Hilbert problem.
Extracta Math., 16(3), 441-447. 2001.
Abstract

W. Li, J. Llibre, X. Zhang.
Planar analytic vector fields with generalized rational first integrals.
Bull. Sci. Math., 125(5), 341-361. 2001. [DOI]
Abstract

J. Llibre, K. R. Meyer, J. Soler.
Erratum: Bridges between the generalized Sitnikov family and the Lyapunov family of periodic orbits [J. Differential Equations 154 (1), 140-156, 1999].
J. Differential Equations, 169(2), 654. 2001. [DOI]
Abstract