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  1. By: Nielsen, C - Kirkegaard, Jørgen B
    Type: Article
    In: The Bulletin of zoological nomenclature
    Volume: 35
    Date: 1978
    Page Range: 25--29
    Publication Info: London International Trust for Zoological Nomenclature
  2. By: Nielsen, C
    Type: Article
    In: Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale in Milano
    Volume: 74
    Date: 1935
    Page Range: 372--382
    Publication Info: Milano, Società Italiana di Scienze Naturali ; Museo Civico di Storia Naturale in Milano,
  3. By: Nielsen, C
    Type: Article
    In: The Bulletin of zoological nomenclature
    Volume: 34
    Date: 1977
    Page Range: 112--122
    Publication Info: London International Trust for Zoological Nomenclature