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  1. By: Lalach, Lindsay A. R. - Bradley, David - Bertram, Douglas - Blight, Louise
    Type: Article
    In: Nature conservation
    Volume: 53
    Date: 2023
    Page Range: 319--320
    Publication Info: Sofia, Bulgaria Pensoft Publishers 2012-
  2. By: Bertram, Douglas - Nagorsen, David W.
    Type: Article
    In: The Canadian field-naturalist
    Volume: 109
    Issue: 1
    Date: 1995
    Page Range: 6--10
    Publication Info: Ottawa Ottawa Field-Naturalists' Club
  3. By: Lalach, Lindsay A. R. - Bradley, David - Bertram, Douglas - Blight, Louise
    Type: Article
    In: Nature conservation
    Volume: 51
    Date: 2023
    Page Range: 155--166
    Publication Info: Sofia, Bulgaria Pensoft Publishers 2012-