| Auteur(s) | Nielsen, A., Steffan-Dewenter, I., Westphal, C., Messinger, O., Potts, S.G., Roberts, S.P and Petanidou, T. |
| Jaar | 2011 |
| Titel | Assessing bee species richness in two Mediterranean communities: importance of habitat type and sampling techniques. Ecological research 26(5): 969-983. |