File:Johnson et al 2001.pdf

Johnson, C., D. Agosti, J. H. C. Delabie, K. Dumpert, D. J. Williams, M. von Tschirnhaus and U. Maschwitz. 2001. Acropyga and Azteca ants (Hymenoptera: Formicidae) with scale insects (Sternorhyncha: Coccoidea): 20 million years of intimate symbiosis. American Museum Novitates 3335: 1-18.