Fractional calculus for scientists and engineers MD Ortigueira Springer Science & Business Media, 2011 | 535 | 2011 |

On the HHT, its problems, and some solutions RT Rato, MD Ortigueira, AG Batista Mechanical systems and signal processing 22 (6), 1374-1394, 2008 | 274 | 2008 |

What is a fractional derivative? MD Ortigueira, JAT Machado Journal of computational Physics 293, 4-13, 2015 | 216 | 2015 |

Riesz potential operators and inverses via fractional centred derivatives MD Ortigueira International Journal of Mathematics and Mathematical Sciences 2006, 2006 | 200 | 2006 |

On the fractional signals and systems R Magin, MD Ortigueira, I Podlubny, J Trujillo Signal Processing 91 (3), 350-371, 2011 | 193 | 2011 |

An introduction to the fractional continuous-time linear systems: the 21st century systems MD Ortigueira IEEE Circuits and Systems Magazine 8 (3), 19-26, 2008 | 187 | 2008 |

Fractional signal processing and applications MD Ortigueira, JA Machado Signal processing 83 (11), 2285-2286, 2003 | 168* | 2003 |

Introduction to fractional linear systems. Part 1: Continuous-time case MD Ortigueira IEE Proceedings-Vision, Image and Signal Processing 147 (1), 62-70, 2000 | 106 | 2000 |

Fractional calculus applications in signals and systems MD Ortigueira, JAT Machado Signal Processing 10 (86), 2503-2504, 2006 | 104 | 2006 |

A coherent approach to non-integer order derivatives MD Ortigueira Signal Processing 86 (10), 2505-2515, 2006 | 92 | 2006 |

Introduction to fractional linear systems. Part 2: discrete-time case MD Ortigueira IEE Proceedings-Vision, Image and Signal Processing 147 (1), 71-78, 2000 | 88 | 2000 |

Fractional model of an electrochemical capacitor V Martynyuk, M Ortigueira Signal Processing 107, 355-360, 2015 | 70 | 2015 |

Fractional central differences and derivatives MD Ortigueira IFAC Proceedings Volumes 39 (11), 58-63, 2006 | 69 | 2006 |

On the initial conditions in continuous-time fractional linear systems MD Ortigueira Signal Processing 83 (11), 2301-2309, 2003 | 69 | 2003 |

Identifying a transfer function from a frequency response D Valério, MD Ortigueira, J Sá da Costa Journal of computational and nonlinear dynamics 3 (2), 2008 | 62 | 2008 |

Fractional discrete-time linear systems MD Ortigueira 1997 IEEE International Conference on Acoustics, Speech, and Signal …, 1997 | 57 | 1997 |

On the relation between the fractional Brownian motion and the fractional derivatives MD Ortigueira, AG Batista Physics Letters A 372 (7), 958-968, 2008 | 44 | 2008 |

From differences to derivatives MD Ortigueira, F Coito Fractional Calculus and Applied Analysis 7 (4), 459, 2004 | 44 | 2004 |

Which differintegration? MD Ortigueira, JAT Machado, JS Da Costa IEE Proceedings-Vision, Image and Signal Processing 152 (6), 846-850, 2005 | 43 | 2005 |

Discrete-time differential systems MD Ortigueira, FJV Coito, JJ Trujillo Signal Processing 107, 198-217, 2015 | 42 | 2015 |