Template:Wappler et al., 2012
- Wappler, T., Meulemeester, T. de, Aytekin, A.M., Michez, D. & Engel, M.S. 2012. Geometric morphometric analysis of a new Miocene bumble bee from the Randeck Maar of southwestern Germany (Hymenoptera: Apidae). Systematic Entomology 37(4): 784–792. DOI: 10.1111/j.1365-3113.2012.00642.x