A. Guillamon.
Study of periodic orbits on the plane. geometric interpretation of the stability and applications to predator-prey systems.
Masters thesis, Universitat Autònoma de Barcelona, 1992. (In Catalan)
Abstract

X. Jarque.
Structural stability of vector fields in dimension two.
Masters thesis, Universitat Autònoma de Barcelona, 1992.
Abstract

E. A. Lacomba, J. Llibre.
Integrals, invariant manifolds, and degeneracy for central force problems in $\mathbb R^n$.
J. Math. Phys., 33(6), 2138-2147. 1992.
Abstract

J. P. Lampreia, J. Llibre, C. Mira, J. Sousa Ramos, G. Targonski.
European Conference on Iteration Theory.
World Scientific Publishing Co. Inc., Singapore, 1992. Proceedings of the conference (ECIT '91) held in Lisbon, Portugal, September 15-21, 1991.
Abstract

J. Llibre.
Periods for Klein bottle maps.
In European Conference on Iteration Theory (Lisbon, 1991), 166-167. World Sci. Publishing, Teaneck NJ, 1992.
Abstract

J. Llibre, R. S. MacKay.
Pseudo-Anosov homeomorphisms on a sphere with four punctures have all periods.
Math. Proc. Cambridge Philos. Soc., 112(3), 539-549. 1992.
Abstract

J. Llibre, J. Paraños, J. Á. Rodríguez.
Periods for Klein bottle maps.
In European Conference on Iteration Theory (Lisbon, 1991), 352-354. World Sci. Publishing, Teaneck NJ, 1992.
Abstract

J. M. Moreno.
Periodic orbits and entropy for maps of the n-star.
PhD thesis, Universitat Autònoma de Barcelona, Bellaterra, November, 1992.
Abstract

Ll. Alsedà, F. Mañosas.
Monotonicity of the entropy for a family of circle maps.
In European Conference on Iteration Theory (Batschuns, 1989), 1-5. World Sci. Publishing, River Edge NJ, 1991.
Abstract

Ll. Alsedà, J. M. Moreno.
Lower bounds of the topological entropy of maps of Y.
J. Math. Anal. Appl., 155(2), 513-530. 1991.
Abstract

J. M. Cors.
Study of the hill problem as a polynomial vector field.
Masters thesis, Universitat Autònoma de Barcelona, Bellaterra, September, 1991. (In Catalan)
Abstract

J. Franks, J. Llibre.
Periods of surface homeomorphisms.
In Continuum theory and dynamical systems (Arcata, CA, 1989), 63-77. Amer. Math. Soc., Providence RI, 1991.
Abstract

A. Gasull, G. Guasp, A. Guillamon.
Applications of Riemannian metrics to systems of planar differential equations.
In XII CEDYA/II Congress on Applied Mathematics (Oviedo, 1991), 129-134. Univ. Oviedo, Oviedo, 1991.
Abstract

A. Gasull, J. Llibre, J. Sotomayor.
Global asymptotic stability of differential equations in the plane.
J. Differential Equations, 91(2), 327-335. 1991.
AbstractFull PDF

J. Guaschi, J. Llibre, R. S. MacKay.
A classification of braid types for periodic orbits of diffeomorphisms of surfaces of genus one with topological entropy zero.
Publ. Mat., 35(2), 543-558. 1991.
Abstract

E. A. Lacomba, J. Llibre, A. Nunes.
Invariant tori and cylinders for a class of perturbed Hamiltonian systems.
In The geometry of Hamiltonian systems (Berkeley, CA, 1989), 373-385. Springer, New York, 1991.
Abstract

J. Llibre.
Bounded polynomial vector fields. II.
In XII CEDYA/II Congress on Applied Mathematics (Oviedo, 1991), 49-59. Univ. Oviedo, Oviedo, 1991.
Abstract

J. Llibre.
On the number of central configurations in the n-body problem.
Celestial Mech. Dynam. Astronom., 50(1), 89-96. 1991.
Abstract

J. Llibre.
Periodic points of one-dimensional maps.
In European Conference on Iteration Theory (Batschuns, 1989), 194-198. World Sci. Publishing, River Edge NJ, 1991.
Abstract

J. Llibre, R. S. MacKay.
Rotation vectors and entropy for homeomorphisms of the torus isotopic to the identity.
Ergodic Theory Dynam. Systems, 11(1), 115-128. 1991.
Abstract