Degenerate Hopf bifurcations in discontinuous planar systems B Coll, A Gasull, R Prohens Journal of mathematical analysis and applications 253 (2), 671-690, 2001 | 109 | 2001 |

Bifurcation of limit cycles from two families of centers B Coll, A Gasull, R Prohens Dyn. Contin. Discrete Impuls. Syst. Ser. A Math. Anal 12 (2), 275-287, 2005 | 67 | 2005 |

Differential equations defined by the sum of two quasi-homogeneous vector fields B Coll, A Gasull, R Prohens Canadian Journal of Mathematics 49 (2), 212-231, 1997 | 50 | 1997 |

Limit cycles for rigid cubic systems A Gasull, R Prohens, J Torregrosa Journal of mathematical analysis and applications 303 (2), 391-404, 2005 | 37 | 2005 |

Canards, folded nodes, and mixed-mode oscillations in piecewise-linear slow-fast systems M Desroches, A Guillamon, E Ponce, R Prohens, S Rodrigues, AE Teruel SIAM review 58 (4), 653-691, 2016 | 35 | 2016 |

Quadratic perturbations of a class of quadratic reversible systems with two centers B Coll, C Li, R Prohens Discrete & Continuous Dynamical Systems-A 24 (3), 699, 2009 | 35 | 2009 |

Limit cycles bifurcating from a perturbed quartic center B Coll, J Llibre, R Prohens Chaos, Solitons & Fractals 44 (4-5), 317-334, 2011 | 25 | 2011 |

Bifurcation of limit cycles from a polynomial non-global center A Gasull, R Prohens, J Torregrosa Journal of Dynamics and Differential Equations 20 (4), 945-960, 2008 | 24 | 2008 |

Quadratic and cubic systems with degenerate infinity A Gasull, R Prohens Journal of Mathematical Analysis and Applications 198 (1), 25-34, 1996 | 23 | 1996 |

Slow–fast n-dimensional piecewise linear differential systems R Prohens, AE Teruel, C Vich Journal of Differential Equations 260 (2), 1865-1892, 2016 | 20 | 2016 |

Canard trajectories in 3D piecewise linear systems R Prohens, AE Teruel Discrete & Continuous Dynamical Systems-A 33 (10), 4595, 2013 | 20 | 2013 |

Center-focus and isochronous center problems for discontinuous differential equations B Coll, A Gasull, R Prohens Discrete & Continuous Dynamical Systems-A 6 (3), 609, 2000 | 16 | 2000 |

Centers and limit cycles for a family of Abel equations MJ Álvarez, JL Bravo, M Fernández, R Prohens Journal of Mathematical Analysis and Applications 453 (1), 485-501, 2017 | 14 | 2017 |

The center problem for discontinuous Liénard differential equation B Coll, R Prohens, A Gasull International Journal of Bifurcation and Chaos 9 (09), 1751-1761, 1999 | 13 | 1999 |

Topological classification of polynomial complex differential equations with all the critical points of centre type MJ Alvarez, A Gasull, R Prohens Journal of Difference Equations and Applications 16 (5-6), 411-423, 2010 | 12 | 2010 |

Alien limit cycles in Liénard equations B Coll, F Dumortier, R Prohens Journal of Differential Equations 254 (3), 1582-1600, 2013 | 11 | 2013 |

Limit cycles for cubic systems with a symmetry of order 4 and without infinite critical points M Álvarez, A Gasull, R Prohens Proceedings of the American Mathematical Society 136 (3), 1035-1043, 2008 | 11 | 2008 |

New lower bounds for the Hilbert numbers using reversible centers R Prohens, J Torregrosa Nonlinearity 32 (1), 331, 2018 | 10 | 2018 |

Periodic orbits for perturbed non-autonomous differential equations B Coll, A Gasull, R Prohens Bulletin des Sciences Mathématiques 136 (7), 803-819, 2012 | 10 | 2012 |

Effective computation of the first Lyapunov quantities for a planar differential equation A Gasull, R Prohens Applicationes Mathematicae 24, 243-250, 1997 | 10 | 1997 |