1. Bortolotti, L., Luthi, F., Flaminio, S., Bogo, G. & Sgolastra, F. (2018). First record of the Asiatic bee Megachile disjunctiformis in Europe. Bulletin of Insectology, 71: 143-149.
2. Catania, R., Nobile, V. & Bella S. (2022). The bees (Hymenoptera, Apoidea) of Egadi’s Archipelago (Sicily, Italy). Biogeographia – The Journal of Integrative Biogeography, 37: A019. doi: 10.21426/B637257470
3. Dionisio, M.A., Rojas, D. & Ramos, F.A. (2020). Primera cita de Xylocopa (Koptortosoma) pubescens Spinola, 1838 (Hymenoptera, Apidae) en las Islas Canarias (España). Boletín de la Sociedad Entomológica Aragonesa, 67: 433-434.
4. Falk, S. & Lewington, R. (2015). Field Guide to the Bees of Great Britain and Ireland. Baydon: Bloomsbury, 432 pp.
5. Friese, H. (1901). Die Bienen Europa’s (Apidae Europaeae). Theil VI., Solitare Apiden: Subfam. Panurginae, Melittinae, Xylocopinae. Self-published, printed by Lampe C., Innsbruck, 284 pp.