ENGEL, Michael S.; MICHENER, Charles D. A minute stingless bee in Eocene Fushan amber from northeastern China (Hymenoptera: Apidae). Journal of Melittology, [S. l.], n. 14, p. 1–10, 2013. DOI: 10.17161/jom.v0i14.4560. Disponível em: https://journals.ku.edu/melittology/article/view/4560. Acesso em: 28 jan. 2025.