Literature
- Baldock, D., Wood, T., Cross, I., Smit, J. 2018. The Bees of Portugal (Hymenoptera: Apoidea: Anthophila) – Entomofauna Suppl. S22: 1–164.
- Falk S.J. & R. Lewington 2015. Field guide to the bees of Great Britain and Ireland. – British Wildlife Publishing Lt. 432 pp.