@PhDThesis{       Denz_2014aa,
  author        = {Denz, Frank},
  file          = {Denz_2014aa.pdf},
  langid        = {german},
  month         = apr,
  school        = {Technische Universität Darmstadt},
  title         = {Modeling and Simulation of Varistor-Related Problems},
  type          = {Dissertation},
  year          = {2014}
}