J. Chavarriga, J. Giné, I. A. García.
Isochronous centers of a linear center perturbed by fourth degree homogeneous polynomial.
Bull. Sci. Math., 123(2), 77-96. 1999.
Abstract

J. Chavarriga, J. Giné, I. A. García.
Isochronous centers of cubic systems with degenerate infinity.
Differ. Equ. Dyn. Syst., 7(2), 221-238. 1999.

J. Chavarriga, M. Sabatini.
A survey of isochronous centers.
Qual. Theory Dyn. Syst., 1(1), 1-70. 1999.
Abstract

C. J. Christopher, J. Llibre.
Algebraic aspects of integrability for polynomial systems.
Qual. Theory Dyn. Syst., 1(1), 71-95. 1999.
Abstract

A. Cima, A. Gasull, F. Mañosas.
The discrete Markus-Yamabe problem.
Nonlinear Anal., 35(3), 343-354. 1999.
AbstractFull PDF

A. Cima, J. Li, J. Llibre.
Area preserving flows on compact connected surfaces.
In Dynamical systems, plasmas and gravitation (Orléans la Source, 1997), 313-319. Springer, Berlin, 1999.
Abstract

A. Cima, F. Mañosas, J. Villadelprat.
Isochronicity for several classes of Hamiltonian systems.
J. Differential Equations, 157(2), 373-413. 1999.
AbstractFull PDF

A. Cima, F. Mañosas, J. Villadelprat.
On bounded vector fields.
Rocky Mountain J. Math., 29(2), 473-489. 1999.
Abstract

B. Coll, R. Prohens, A. Gasull.
The center problem for discontinuous Liénard differential equation.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 9(9), 1751-1761. 1999.
Abstract

M. Corbera.
Periodic and quasi-periodic motions for the spatial isosceles 3-body problem.
PhD thesis, Universitat Autònoma de Barcelona, September, 1999.
Abstract

M. A. Frutos, H. Hamoudi, X. Jarque.
Equilibrium existence in the circle model with linear quadratic transport cost.
Reg. Sci. Urban Eco., 29, 605-615. 1999. [DOI]
Abstract

N. Fagella.
Dynamics of the complex standard family.
J. Math. Anal. Appl., 229(1), 1-31. 1999. [DOI]
PreprintAbstract

N. Fagella.
Els origens de la dinàmica complexa.
Aleph (revista de la Facultat de Matemàtiques de la UB), . 1999.
AbstractFull PDF

A. Gasull, A. Guillamon, V. Mañosa.
An analytic-numerical method for computation of the Liapunov and period constants derived from their algebraic structure.
SIAM J. Numer. Anal., 36(4), 1030-1043. 1999.
Abstract

A. Gasull, J. Torregrosa.
Euler-Jacobi formula for double points and applications to quadratic and cubic systems.
Bull. Belg. Math. Soc. Simon Stevin, 6(3), 337-346. 1999. [DOI]
PreprintAbstract

A. Gasull, J. Torregrosa.
Small-amplitude limit cycles in Liénard systems via multiplicity.
J. Differential Equations, 159(1), 186-211. 1999. [DOI]
PreprintAbstract

P. Hilton, J. Pedersen.
Integrating geometry at the pre-university level: paper folding and number theory.
Butl. Soc. Catalana Mat., 14(2), 63-91. 1999. (Translated by J. Soler)
Abstract

M. C. Leseduarte, J. Llibre.
On the full periodicity kernel for one-dimensional maps.
Ergodic Theory Dynam. Systems, 19(1), 101-126. 1999.
Abstract

J. Llibre, K. R. Meyer, J. Soler.
Bridges between the generalized Sitnikov family and the Lyapunov family of periodic orbits.
J. Differential Equations, 154(1), 140-156. 1999.
Abstract

J. Llibre, A. Nunes.
Minimum number of fixed points for maps of the figure eight space.
Internat. J. Bifur. Chaos Appl. Sci. Engrg., 9(9), 1795-1802. 1999.
Abstract