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  1. By: Boer, P. J. den (Pieter Johannes), - Vleugel, D. A.
    Type: Article
    In: Tijdschrift voor entomologie
    Volume: 91
    Date: 1949
    Page Range: 121--134
    Publication Info: [Amsterdam], Nederlandse Entomologische Vereniging,
  2. By: Vleugel, D. A.
    Type: Article
    In: Entomologische berichten
    Volume: 33
    Issue: 7
    Date: 1973
    Page Range: 121--127
    Publication Info: Amsterdam