@article{ErlacherTrusch1998,
  author    = {Erlacher, S.-I. and Trusch, Robert},
  title     = {Zur Taxonomie und Phylogenie des Geometridentaxon Syscia H{\"u}bner, [1825] (Insecta: Lepidoptera)},
  year      = {1998},
  language  = {de}
}
@article{ErlacherTrusch1999,
  author    = {Erlacher, S.-I. and Trusch, Robert},
  title     = {Zur Phylogenie und Verbreitung der Arten der Dyscia-conspersaria ([Denis \& Schifferm{\"u}ller] 1775)-Gruppe (= Dyscia s.str.) (Lepidoptera: Geometridae)},
  year      = {1999},
  language  = {de}
}