A degree for S1-equavariant orthogonal maps and its applications to bifurcation theory S Rybicki Nonlinear Analysis: Theory, Methods & Applications 23 (1), 83-102, 1994 | 82 | 1994 |

Degree for equivariant gradient maps S Rybicki Milan Journal of Mathematics 73 (1), 103-144, 2005 | 52 | 2005 |

A short treatise on the equivariant degree theory and its applications Z Balanov, W Krawcewicz, S Rybicki, H Steinlein Journal of Fixed Point Theory and Applications 8 (1), 1-74, 2010 | 46 | 2010 |

Existence of limit cycles for coupled van der Pol equations N Hirano, S Rybicki Journal of Differential Equations 195 (1), 194-209, 2003 | 43 | 2003 |

Applications of degree for -equivariant gradient maps to variational nonlinear problems with -symmetries S Rybicki Topological Methods in Nonlinear Analysis 9 (2), 383-417, 1997 | 40 | 1997 |

Classification of homotopy classes of equivariant gradient maps EN Dancer, K Geba, S Rybicki Fund. Math 185 (1), 1-18, 2005 | 32 | 2005 |

Existence and continuation of periodic solutions of autonomous Newtonian systems J Fura, A Ratajczak, S Rybicki Journal of Differential Equations 218 (1), 216-252, 2005 | 31 | 2005 |

Global bifurcations of critical orbits of G-invariant strongly indefinite functionals A Gołȩbiewska, S Rybicki Nonlinear Analysis: Theory, Methods & Applications 74 (5), 1823-1834, 2011 | 23 | 2011 |

A note on periodic solutions of autonomous Hamiltonian systems emanating from degenerate stationary solutions EN Dancer, S Rybicki Differential and Integral Equations 12 (2), 147-160, 1999 | 22 | 1999 |

On Rabinowitz alternative for the Laplace-Beltrami operator on : continua that meet infinity S Rybicki Differential and Integral Equations 9 (6), 1267-1277, 1996 | 20 | 1996 |

Periodic trajectories near degenerate equilibria in the Hénon-Heiles and Yang-Mills Hamiltonian systems A Maciejewski, W Radzki, S Rybicki Journal of Dynamics and Differential Equations 17 (3), 475-488, 2005 | 19 | 2005 |

Equivariant bifurcation index GL Garza, S Rybicki Nonlinear Analysis: Theory, Methods & Applications 73 (9), 2779-2791, 2010 | 18 | 2010 |

Global Bifurcations of Solutions of Emden–Fowler-Type Equation− Δu (x)= λf (u (x)) on an Annulus in Rn, n⩾ 3 SM Rybicki Journal of Differential Equations 183 (1), 208-223, 2002 | 18 | 2002 |

Global bifurcations of periodic solutions of the restricted three body problem AJ Maciejewski, SM Rybicki Celestial Mechanics and Dynamical Astronomy 88 (3), 293-324, 2004 | 17 | 2004 |

Periodic solutions of second order Hamiltonian systems bifurcating from infinity J Fura, S Rybicki Annales de l'IHP Analyse non linéaire 24 (3), 471-490, 2007 | 16 | 2007 |

EQUIVARIANT CONLEY INDEX VERSUS DEGREE FOR EQUIVARIANT GRADIENT MAPS. A Gołębiewska, S Rybicki Discrete & Continuous Dynamical Systems-Series S 6 (4), 2013 | 15 | 2013 |

Applications of equivariant degree for gradient maps to symmetric Newtonian systems H Ruan, S Rybicki Nonlinear Analysis: Theory, Methods & Applications 68 (6), 1479-1516, 2008 | 15 | 2008 |

Degenerate bifurcation points of periodic solutions of autonomous Hamiltonian systems W Radzki, S Rybicki Journal of Differential Equations 202 (2), 284-305, 2004 | 14 | 2004 |

Global bifurcations of solutions of elliptic differential equations S Rybicki Journal of mathematical analysis and applications 217 (1), 115-128, 1998 | 14 | 1998 |

Degree for S1-equivariant strongly indefinite functionals S Rybicki Nonlinear analysis 43 (8), 1001-1017, 2001 | 13 | 2001 |