J. Llibre, J. Paraños, J. Á. Rodríguez.
Sets of periods for maps on connected graphs with zero Euler characteristic having all branching points fixed.
J. Math. Anal. Appl., 239(1), 85-100. 1999.
Abstract

J. Llibre, E. Ponce.
Bifurcation of a periodic orbit from infinity in planar piecewise linear vector fields.
Nonlinear Anal., 36(5, Ser. B: Real World Appl.), 623-653. 1999.
Abstract

V. Mañosa.
Qualitative study of the centers for a vector fields on the plane.
PhD thesis, Universitat Autònoma de Barcelona, March, 1999. (In Catalan)
Abstract

G. Rota.
Ten lessons I wish I had been taught.
Butl. Soc. Catalana Mat., 14(2), 111-116. 1999. (Translated from the English by P. Mumbrú)
Abstract

J. Villadelprat.
Index of vector fields on manifolds and isochronicity for planar Hamiltonian differential systems.
PhD thesis, Universitat Autònoma de Barcelona, October, 1999.
Abstract

Ll. Alsedà, A. Falcó.
On the structure of the kneading space of bimodal degree one circle maps.
In XV CEDYA/V Congress on Applied Mathematics (Vigo, 1997), 145-149. Univ. Vigo, Vigo, 1998.
Abstract

Ll. Alsedà, V. Jiménez, L. Snoha.
All solenoids of piecewise smooth maps are period doubling.
Fund. Math., 157(02/03/09), 121-138. 1998. (Dedicated to the memory of {W}ieslaw {S}zlenk)
Abstract

Ll. Alsedà, J. Llibre, M. Misiurewicz.
Badly ordered cycles of circle maps.
Pacific J. Math., 184(1), 23-41. 1998.
Abstract

M. Álvarez-Ramírez, J. Llibre.
Restricted three-body problems and the non-regularization of the elliptic collision restricted isosceles three-body problem.
Extracta Math., 13(1), 73-94. 1998.
Abstract

J. C. Artés, B. Grünbaum, J. Llibre.
On the number of invariant straight lines for polynomial differential systems.
Pacific J. Math., 184(2), 207-230. 1998.
Abstract

J. C. Artés, R. E. Kooij, J. Llibre.
Structurally stable quadratic vector fields.
Mem. Amer. Math. Soc., 134(639), viii+108. 1998.
Abstract

E. Athanassoula, A. Garijo, C. García Gómez.
Formation of brightest cluster members.
In Untangling Coma Berenices: A New Vision of an Old Cluster. Proceedings of the meeting held in Marseilles (France), June 17-20, 1997, . Word Scientific Publishing Co Pte Ltd, 1998.
Abstract

J. Bernat, J. Llibre.
Hurwitz systems with periodic orbits. Counterexamples to Kalman and Markus-Yamabe conjectures.
In International Conference on Differential Equations (Lisboa, 1995), 39-58. World Sci. Publishing, River Edge NJ, 1998.
Abstract

M. Chas.
Minimum periods of homeomorphisms of orientable surfaces.
PhD thesis, Universitat Autònoma de Barcelona, 1998.
Abstract

J. Chavarriga, I. A. García, J. Giné.
Quadratic integrable chordal systems.
In XV CEDYA/V Congress on Applied Mathematics (Vigo, 1997), 225-230. Univ. Vigo, Vigo, 1998.
Abstract

J. Chavarriga, J. Giné.
Integrability of a linear center perturbed by cubic polynomials.
In XV CEDYA/V Congress on Applied Mathematics (Vigo, 1997), 231-236. Univ. Vigo, Vigo, 1998.
Abstract

J. Chavarriga, J. Giné.
Integrable systems via inverse integrating factor.
Extracta Math., 13(1), 41-60. 1998.
Abstract

J. Chavarriga, J. Giné.
Polynomial first integrals of systems in the plane with center type linear part.
Nonlinear Anal., 31(05/06/09), 521-535. 1998.
Abstract

J. Chavarriga, J. Giné.
Integrability of cubic systems with degenerate infinity.
Differ. Equ. Dyn. Syst., 6(4), 425-438. 1998.
Abstract

J. Chavarriga, J. Llibre.
On the algebraic limit cycles of quadratic systems.
In IV Catalan Days of Applied Mathematics (Tarragona, 1998), 17-24. Univ. Rovira Virgili, Tarragona, 1998.
Abstract