An a priori error analysis of the local discontinuous Galerkin method for elliptic problems P Castillo, B Cockburn, I Perugia, D Schötzau SIAM Journal on Numerical Analysis 38 (5), 1676-1706, 2000 | 672 | 2000 |

Superconvergence of the local discontinuous Galerkin method for elliptic problems on Cartesian grids B Cockburn, G Kanschat, I Perugia, D Schötzau SIAM Journal on Numerical Analysis 39 (1), 264-285, 2001 | 375 | 2001 |

Computational models of electromagnetic resonators: analysis of edge element approximation D Boffi, P Fernandes, L Gastaldi, I Perugia SIAM journal on numerical analysis 36 (4), 1264-1290, 1999 | 273 | 1999 |

Plane Wave Discontinuous Galerkin Methods for the 2D Helmholtz Equation: Analysis of the *p*-VersionR Hiptmair, A Moiola, I Perugia SIAM Journal on Numerical Analysis 49 (1), 264-284, 2011 | 219 | 2011 |

Interior penalty method for the indefinite time-harmonic Maxwell equations P Houston, I Perugia, A Schneebeli, D Schötzau Numerische Mathematik 100, 485-518, 2005 | 215 | 2005 |

Plane wave discontinuous Galerkin methods: analysis of the h-version CJ Gittelson, R Hiptmair, I Perugia ESAIM: Mathematical Modelling and Numerical Analysis 43 (2), 297-331, 2009 | 214 | 2009 |

Block‐diagonal and indefinite symmetric preconditioners for mixed finite element formulations I Perugia, V Simoncini Numerical linear algebra with applications 7 (7‐8), 585-616, 2000 | 209 | 2000 |

An *hp*-Analysis of the Local Discontinuous Galerkin Method for Diffusion ProblemsI Perugia, D Schötzau Journal of Scientific Computing 17, 561-571, 2002 | 205 | 2002 |

The ℎ𝑝-local discontinuous Galerkin method for low-frequency time-harmonic Maxwell equations I Perugia, D Schötzau Mathematics of Computation 72 (243), 1179-1214, 2003 | 182 | 2003 |

Plane wave approximation of homogeneous Helmholtz solutions A Moiola, R Hiptmair, I Perugia Zeitschrift für angewandte Mathematik und Physik 62, 809-837, 2011 | 173 | 2011 |

Discontinuous Galerkin approximation of the Maxwell eigenproblem A Buffa, I Perugia SIAM Journal on Numerical Analysis 44 (5), 2198-2226, 2006 | 167 | 2006 |

Mixed discontinuous Galerkin approximation of the Maxwell operator P Houston, I Perugia, D Schotzau SIAM Journal on Numerical Analysis 42 (1), 434-459, 2004 | 158 | 2004 |

A survey of Trefftz methods for the Helmholtz equation R Hiptmair, A Moiola, I Perugia Building bridges: connections and challenges in modern approaches to …, 2016 | 152 | 2016 |

Stabilized interior penalty methods for the time-harmonic Maxwell equations I Perugia, D Schötzau, P Monk Computer Methods in Applied Mechanics and Engineering 191 (41-42), 4675-4697, 2002 | 147 | 2002 |

A plane wave virtual element method for the Helmholtz problem I Perugia, P Pietra, A Russo ESAIM: Mathematical Modelling and Numerical Analysis 50 (3), 783-808, 2016 | 146 | 2016 |

A Lagrange multiplier method for the finite element solution of elliptic interface problems using non-matching meshes P Hansbo, C Lovadina, I Perugia, G Sangalli Numerische Mathematik 100, 91-115, 2005 | 141 | 2005 |

Discontinuous Galerkin approximation of the Laplace eigenproblem PF Antonietti, A Buffa, I Perugia Computer methods in applied mechanics and engineering 195 (25-28), 3483-3503, 2006 | 122 | 2006 |

Error analysis of Trefftz-discontinuous Galerkin methods for the time-harmonic Maxwell equations R Hiptmair, A Moiola, I Perugia Mathematics of Computation 82 (281), 247-268, 2013 | 106 | 2013 |

Discontinuous Galerkin computation of the Maxwell eigenvalues on simplicial meshes A Buffa, P Houston, I Perugia Journal of computational and applied mathematics 204 (2), 317-333, 2007 | 100 | 2007 |

Energy norm a posteriori error estimation for mixed discontinuous Galerkin approximations of the Maxwell operator P Houston, I Perugia, D Schötzau Computer methods in applied mechanics and engineering 194 (2-5), 499-510, 2005 | 100 | 2005 |