1. The Swiss agri-environment scheme enhances pollinator diversity and plant reproductive success in nearby intensively managed farmland;Albrecht;J. Appl. Ecol.,2007
2. Apidae, 1: Allgemeiner Teil, Gattungsschlüssel, die Gattungen Apis, Bombus und Psithyrus, Insecta Helvetica;Amiet,1996
3. Apidae 2: Colletes, Dufourea, Hyleaus, Nomia, Nomioides, Rhophitoides, Rophites, Sphecodes, Systropha, Fauna Helvetica;Amiet,1999
4. Apidae 3: Halictus, Lasioglossum, Fauna Helvetica;Amiet,2001
5. Apidae 4: Anthidium, Chelostoma, Coelioxys, Dioxys, Heriades, Lithurgus, Megachile, Osmia, Stelis, Fauna Helvetica 9;Amiet,2004