Literature
- Alireza, M., A. Talebi, G. Tahmasbi, P.H. Williams, E. EbrahimiI & A. Taghavi 2007. Bumblebees of Iran: Localities and Food-Plants, with Additions and Corrections (Hymenoptera: Apidae: Bombus). Entomologia generalis.
- Banaszak, J. and Dochkova, B. 2014. Bees (Hymenoptera, Apoidea, Apiformes) in the agricultural landscape of Bulgaria: species diversity Journal of Apicultural Science Vol. 58 No. 1 pp. 29-49.