Bombus (Psithyrus) campestris (PANZER, 1800)

Literature

• Baldock, D., Wood, T., Cross, I., Smit, J. 2018. The Bees of Portugal (Hymenoptera: Apoidea: Anthophila) – Entomofauna Suppl. S22: 1–164.
• Bieri, S. 2002. Die Bienen und Wespen des Fürstentums Liechtenstein. Amtlicher Lehrmittelverlag.
• Else, G.R. & Edwards, M. 2018. Handbook of the Bees of the British Isles. Ray Society, London.
• Söderman, G. and Leinonen, R. 2003. Suomen Mesipistiäiset ja niiden uhanalaisuus. Tremex Press Oy, Helsinki.
• Wind, P. & Pihl, S. (eds.) 2010. The Danish Red List. - The National Environmental Research Institute, Aarhus University [2004]-. http://redlist.dmu.dk (updated April 2010).