A variational approach to a Kirchhoff-type problem involving two parameters JR Graef, S Heidarkhani, L Kong Results in Mathematics 3 (63), 877-889, 2013 | 52 | 2013 |

Existence of three solutions for a class of Dirichlet quasilinear elliptic systems involving the (p1,…, pn)-Laplacian GA Afrouzi, S Heidarkhani Nonlinear Analysis: Theory, Methods & Applications 70 (1), 135-143, 2009 | 43 | 2009 |

Multiplicity results for perturbed fourth-order Kirchhoff type elliptic problems M Ferrara, S Khademloo, S Heidarkhani Applied mathematics and computation 234, 316-325, 2014 | 42 | 2014 |

Three solutions for a Dirichlet boundary value problem involving the p-Laplacian GA Afrouzi, S Heidarkhani Nonlinear Analysis: Theory, Methods & Applications 66 (10), 2281-2288, 2007 | 41 | 2007 |

Infinitely many solutions for systems of two-point Kirchhoff-type boundary value problems S Heidarkhani Annales Polonici Mathematici 107, 133-152, 2013 | 36 | 2013 |

Three solutions for a quasilinear boundary value problem GA Afrouzi, S Heidarkhani Nonlinear Analysis: Theory, Methods & Applications 69 (10), 3330-3336, 2008 | 35 | 2008 |

Existence of three solutions for a doubly eigenvalue fourth-order boundary value problem GA Afrouz, S Heidarkhani, D O’Regan Taiwanese Journal of Mathematics 15 (1), 201-210, 2011 | 32 | 2011 |

Infinitely many periodic solutions for a class of perturbed second-order differential equations with impulses S Heidarkhani, M Ferrara, A Salari Acta Applicandae Mathematicae 139 (1), 81-94, 2015 | 31 | 2015 |

WITHDRAWN: Existence results for fractional differential systems through a local minimization principle S Heidarkhani, Y Zhou, G Caristi, GA Afrouzi, S Moradi Computers & Mathematics with Applications, 2016 | 30 | 2016 |

Multiplicity results for a class of gradient systems depending on two parameters S Heidarkhani, Y Tian Nonlinear Analysis: Theory, Methods & Applications 73 (2), 547-554, 2010 | 29 | 2010 |

Nontrivial solutions for one-dimensional fourth-order Kirchhoff-type equations S Heidarkhani, M Ferrara, S Khademloo Mediterranean Journal of Mathematics 13 (1), 217-236, 2016 | 28 | 2016 |

Infinitely many solutions for systems of multi-point boundary value problems using variational methods JR Graef, S Heidarkhani, L Kong Topological Methods in Nonlinear Analysis 42 (1), 105-118, 2013 | 28 | 2013 |

Multiplicity results for a two-point boundary value problem S Heidarkhani, D Motreanu Panamer. Math. J 19 (3), 69-78, 2009 | 28 | 2009 |

Existence of one weak solution for p (x)-biharmonic equations with Navier boundary conditions S Heidarkhani, GA Afrouzi, S Moradi, G Caristi, B Ge Zeitschrift für angewandte Mathematik und Physik 67 (3), 1-13, 2016 | 26 | 2016 |

Multiple solutions for a class of Dirichlet quasilinear elliptic systems driven by a (p, q)-Laplacian operator G Bonanno, S Heidarkhani, D O'regan Dynamic Systems and Applications 20 (1), 89, 2011 | 24 | 2011 |

Infinitely many solutions for perturbed impulsive fractional differential systems S Heidarkhani, Y Zhao, G Caristi, GA Afrouzi, S Moradi Applicable Analysis 96 (8), 1401-1424, 2017 | 23 | 2017 |

Steklov problem involving the p (x)-Laplacian GA Afrouzi, A Hadjian, S Heidarkhani Electron. J. Differential Equations 134, 1-11, 2014 | 23 | 2014 |

Multiple solutions for a class of -biharmonic systems JR Graef, S Heidarkhani, L Kong Communications on Pure & Applied Analysis 12 (3), 1393, 2013 | 22 | 2013 |

A critical points approach for the existence of multiple solutions of a Dirichlet quasilinear system JR Graef, S Heidarkhani, L Kong Journal of Mathematical Analysis and Applications 388 (2), 1268-1278, 2012 | 22 | 2012 |

THREE SOLUTIONS TO A CLASS OF NEUMANN DOUBLY EIGENVALUE ELLIPTIC SYSTEMS DRIVEN BY A (p_{1},...,p_{n})-LAPLACIANGA Afrouzi, S Heidarkhani, D O'Regan Bulletin of the Korean Mathematical Society 47 (6), 1235-1250, 2010 | 22 | 2010 |