Auteur(s)	Knudsen, J. T. and J. M. Olesen.
Jaar	1993
Titel	Buzz-pollination and patterns in sexual traits in North European Pyrolaceae. Am. J. Bot. 80:900-913.

• Bombus (Bombus) lucorum
• Bombus (Bombus) terrestris
• Bombus (Kallobombus) soroeensis
• Bombus (Melanobombus) lapidarius
• Bombus (Psithyrus) bohemicus
• Bombus (Psithyrus) quadricolor
• Bombus (Pyrobombus) hypnorum
• Bombus (Pyrobombus) jonellus
• Bombus (Pyrobombus) pratorum
• Bombus (Thoracobombus) pascuorum