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  1. By: Gates, Michael William - Hanson, Paul E
    Type: Article
    In: Journal of Hymenoptera research
    Volume: 18
    Date: 2009
    Page Range: 25--73
    Publication Info: Washington, D.C, International Society of Hymenopterists, [1992-
  2. By: Mejías, Daniel Zamora - Hanson, Paul E - Starý, Petr
    Type: Article
    In: Psyche
    Volume: 2010
    Date: 2010
    Page Range: 1--7
    Publication Info: Cambridge, Mass, Cambridge Entomological Club,