1. Rote Liste der gefährdeten Bienen der Schweiz;Amiet,1994
2. Amiet, F., Herrmann, M., Müller, A., Neumeyer, R., 2004. Apidae 4: Anthidium, Chelostoma, Coelioxys, Dioxys, Heriades, Lithurgus, Megachile, Osmia, Stelis. Fauna Helvetica, 9, CSCF/BUWAL, Neuenburg.
3. Buzz pollination in angiosperms;Buchmann,1983
4. The plight of pollinating bees;Buchmann;Bee World,2005
5. Importance of pollen grain volumes for calculating bee diets;Buchmann;Grana,1991