Johannes Kroiss; Klaus Lechner; Erhard Strohm (2009). "Male territoriality and mating system in the European beewolf Philanthus triangulum F. (Hymenoptera: Crabronidae): evidence for a "hotspot" lek polygyny". Journal of Ethology. 28 (2): 295–304. doi:10.1007/s10164-009-0185-5. S2CID25547620.
Johannes Kroiss; Klaus Lechner; Erhard Strohm (2009). "Male territoriality and mating system in the European beewolf Philanthus triangulum F. (Hymenoptera: Crabronidae): evidence for a "hotspot" lek polygyny". Journal of Ethology. 28 (2): 295–304. doi:10.1007/s10164-009-0185-5. S2CID25547620.