Literature
- Balzan, M.V., Rasmont, P., Kuhlmann, M., Dathe, H., Pauly, A., Patiny, S., Terzo, M. and Michez, D. 2016. The bees (Hymenoptera: Apoidea) of the Maltese Islands. Zootaxa, 4162(2), pp.225-244.
- Lhomme, P. 2014. Osmia kohli. The IUCN Red List of Threatened Species 2014: e.T19199130A21155462. Downloaded on 30 March 2018.
- Müller, A. 2018. Palaearctic Osmiine Bees, ETH Zürich, http://blogs.ethz.ch/osmiini.