M. Carbonell, J. Llibre.
Hopf bifurcation, averaging methods and Liapunov quantities for polynomial systems with homogeneous nonlinearities.
In European Conference on Iteration Theory (Caldes de Malavella, 1987), 145-160. World Sci. Publishing, Teaneck NJ, 1989.
Abstract

M. Carbonell, J. Llibre.
Limit cycles of polynomial systems with homogeneous nonlinearities.
J. Math. Anal. Appl., 142(2), 573-590. 1989. [DOI] (With the collaboration of Bartomeu Coll)
Abstract

M. Carbonell, J. Llibre.
Chordal cubic systems.
Publ. Mat., 33(2), 253-311. 1989. [DOI]
Abstract

F. Cedó, J. Llibre.
Symmetric central configurations of the spatial n-body problem.
J. Geom. Phys., 6(3), 367-394. 1989. [DOI]
Abstract

A. Cima, J. Llibre.
Configurations of fans and nests of limit cycles for polynomial vector fields in the plane.
J. Differential Equations, 82(1), 71-97. 1989. [DOI]
Abstract

A. Cima, J. Llibre.
On the configurations of limit cycles for polynomial vector fields in the plane.
In European Conference on Iteration Theory (Caldes de Malavella, 1987), 416-420. World Sci. Publishing, Teaneck NJ, 1989.
Abstract

B. Coll, A. Gasull, J. Llibre.
Uniqueness of limit cycles for a class of Liénard systems with applications.
J. Math. Anal. Appl., 141(2), 442-450. 1989. [DOI]
Abstract

A. Gasull.
Differential equations that can be transformed into equations of Liénard type.
In Actas del XVLL Colloquio Brasileiro de Matematica, . 1989.
Abstract

A. Gasull.
Disappearance of limit cycles for some families of planar vector fields.
In European Conference on Iteration Theory (Caldes de Malavella, 1987), 225-230. World Sci. Publishing, Teaneck NJ, 1989.
Abstract

A. Guillamon.
An overview of mathematics in nineteenth-century in Catalonia.
Butl. Soc. Catalana Mat., 4, 47-67. 1989.
Abstract

J. Llibre, P. Mumbrú.
Renormalisation and periodic structure for bimodal maps.
In European Conference on Iteration Theory (Caldes de Malavella, 1987), 253-262. World Sci. Publishing, Teaneck NJ, 1989.
Abstract

J. Llibre, C. Piñol.
Transversal ejection-collision orbits for the restricted three-body problem.
In European Conference on Iteration Theory (Caldes de Malavella, 1987), 263-270. World Sci. Publishing, Teaneck NJ, 1989.
Abstract

A. Nunes.
Separatrix surfaces and invariant manifolds of a class of integrable Hamiltonian systems and their perturbations.
PhD thesis, Universitat Autònoma de Barcelona, Bellaterra, September, 1989.
Abstract

Y. Q. Ye, W. Y. Ye, J. C. Artés.
Bifurcation of saddle-node and separatrix cycle with the variation of the parameter in a certain quadratic differential system.
Ann. Differential Equations, 5(1), 99-106. 1989.
Abstract

Ll. Alsedà, J. Llibre, F. Mañosas, M. Misiurewicz.
Lower bounds of the topological entropy for continuous maps of the circle of degree one.
Nonlinearity, 1(3), 463-479. 1988.
Abstract

M. Carbonell, J. Llibre.
Limit cycles of a class of polynomial systems.
Proc. Roy. Soc. Edinburgh Sect. A, 109(01/02/09), 187-199. 1988. [DOI]
Abstract

A. Chenciner, J. Llibre.
A note on the existence of invariant punctured tori in the planar circular restricted three-body problem.
Ergodic Theory Dynam. Systems, 8^*, 63-72. 1988. [DOI] (Charles Conley Memorial Issue)
Abstract

B. Coll, A. Gasull, J. Llibre.
Quadratic systems with a unique finite rest point.
Publ. Mat., 32(2), 199-259. 1988. [DOI]
Abstract

A. Gasull.
Sobre la ley de Titius-Bode.
Bol. Soc. Ast. Barberà del Vallès, 1-5. 1988.
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A. Gasull, J. Llibre.
On the nonsingular quadratic differential equations in the plane.
Proc. Amer. Math. Soc., 104(3), 793-794. 1988. [DOI]
Abstract