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  1. By: Mauss, Volker - Müller, Andreas
    Type: Article
    In: Journal of Hymenoptera research
    Volume: 39
    Date: 2014
    Page Range: 119-153
    Publication Info: Washington, D.C International Society of Hymenopterists
    Subjects: Echium  flower association  mating behaviour  nest construction  oligolecty  Palaearctic  sleeping aggregation