Ulam stability for a delay differential equation D Otrocol, V Ilea Open Mathematics 11 (7), 1296-1303, 2013 | 41 | 2013 |

Functional differential equations with maxima of mixed type D Otrocol, IA Rus Fixed Point Theory 9 (1), 207-220, 2008 | 25 | 2008 |

Functional-differential equations with" maxima" via weakly Picard operators theory D Otrocol, IA Rus Bulletin mathématique de la Société des Sciences Mathématiques de Roumanie …, 2008 | 22 | 2008 |

Systems of functional-differential equations with maxima, of mixed type D Otrocol Electronic Journal of Qualitative Theory of Differential Equations 2014 (5), 1-9, 2014 | 17 | 2014 |

Dhage iteration method for approximating solutions of nonlinear differential equations with maxima BC Dhage, D Otrocol Fixed Point Theory 19 (2), 545-556, 2018 | 16 | 2018 |

Ulam stabilities of differential equation with abstract Volterra operator in a Banach space D Otrocol Nonlinear Funct. Anal. Appl 15 (4), 613-619, 2010 | 12 | 2010 |

Iterates of Bernstein type operators on a square with one curved side via contraction principle T Catinas, D Otrocol Fixed Point Theory 14 (1), 97-106, 2013 | 11 | 2013 |

Classical results via Mann-Ishikawa iteration ŞM Şoltuz, D Otrocol Journal of Numerical Analysis and Approximation Theory 36 (2), 193-197, 2007 | 9 | 2007 |

Iterates of multivariate Cheney-Sharma operators T Catinas, D Otrocol J. Comput. Anal. Appl 15 (7), 1240-1248, 2013 | 8 | 2013 |

On a DV Ionescu’s problem for functional-differential equations VA Ilea, D Otrocol Fixed Point Theory 10 (1), 125-140, 2009 | 8 | 2009 |

Lotka-Volterra system with two delays via weakly Picard operators D Otrocol Nonlinear Analysis Forum 10 (2), 193, 2005 | 7 | 2005 |

Qualitative properties of functional differential equation D Otrocol, V Ilea Electronic Journal of Qualitative Theory of Differential Equations 2014 (47 …, 2014 | 6 | 2014 |

Integro-differential equation with two time lags V Ilea, D Otrocol, MA Serban, D Trif Fixed Point Theory 13 (1), 85-97, 2012 | 6 | 2012 |

Abstract Volterra operators D Otrocol Carpathian Journal of Mathematics, 370-377, 2008 | 6 | 2008 |

Data dependence for the solution of a Lotka-Volterra system with two delays D Otrocol Mathematica 48, 61-68, 2006 | 6 | 2006 |

Some properties of solutions of a functional-differential equation of second order with delay V Ana Ilea, D Otrocol The Scientific World Journal 2014, 2014 | 5 | 2014 |

Lotka-Volterra systems with retarded argument D Otrocol Presa Universitara Clujeana, Cluj-Napoca, 2007 | 5 | 2007 |

An iterative method for a functional-differential equation with mixed type argument D Otrocol, VA Ilea, C Revnic Fixed Point Theory 11 (2), 327-336, 2010 | 4 | 2010 |

On approximation by some Bernstein–Kantorovich exponential-type polynomials A Aral, D Otrocol, I Raşa Periodica Mathematica Hungarica 79 (2), 236-254, 2019 | 3 | 2019 |

Properties of solutions of system of differential equations with maxima, via weakly Picard operator theory D Otrocol Commun. Appl. Anal 17 (1), 99-107, 2013 | 3 | 2013 |