Center-Focus Problem for Discontinuous Planar Differential Equations. - Armengol Gasull; Joan Torregrosa (Int. J. Bifurc. Chaos, 2003)

Global Classification of a Class of cubic Vector Fields whose Canonical Regions are Period annuli. - Magdalena Caubergh; Jaume Llibre; Joan Torregrosa (Int. J. Bifurc. Chaos, 2011)

Global Phase portraits of some Reversible cubic Centers with Collinear or Infinitely Many Singularities. - Magdalena Caubergh; Jaume Llibre; Joan Torregrosa (Int. J. Bifurc. Chaos, 2012)

Global phase Portraits of some Reversible cubic Centers with Noncollinear singularities. - Magdalena Caubergh; Joan Torregrosa (Int. J. Bifurc. Chaos, 2013)

Lower Bounds for the Maximum Number of Limit cycles of Discontinuous piecewise Linear differential Systems with a Straight Line of Separation. - Jaume Llibre; Marco Antonio Teixeira; Joan Torregrosa (Int. J. Bifurc. Chaos, 2013)

Asymptotic Expansion of the Heteroclinic Bifurcation for the Planar Normal Form of the 1: 2 Resonance. - Luci A. F. Roberto; Paulo Ricardo da Silva; Joan Torregrosa (Int. J. Bifurc. Chaos, 2016)

Algebraic Limit Cycles in Piecewise Linear Differential Systems. - Claudio A. Buzzi; Armengol Gasull; Joan Torregrosa (Int. J. Bifurc. Chaos, 2018)

24 crossing limit cycles in only one nest for piecewise cubic systems. - Luiz F. S. Gouveia; Joan Torregrosa (Appl. Math. Lett., 2020)

On the Number of Limit Cycles in Generalized Abel Equations. - Jianfeng Huang; Joan Torregrosa; Jordi Villadelprat (SIAM J. Appl. Dyn. Syst., 2020)

Centers and Limit Cycles of Vector Fields Defined on Invariant Spheres. - Claudio A. Buzzi; Ana Livia Rodero; Joan Torregrosa (J. Nonlinear Sci., 2021)

Hopf bifurcation in 3-dimensional polynomial vector fields. - Iván Sánchez-Sánchez; Joan Torregrosa (Commun. Nonlinear Sci. Numer. Simul., 2022)

Period Function for a Family of Piecewise Planar Hamiltonian Systems. - Alex C. Rezende; Mirianne A. S. Santos; Joan Torregrosa (Int. J. Bifurc. Chaos, 2024)

Limit cycles of homogeneous polynomial Kukles differential systems. - Jaume Giné; Joan Torregrosa (Math. Comput. Simul., 2025)