Johnson, hristine; Agosti, Donat; Delabie, Jacques H.; Dumpert, Klaus; Williams, D. J.; Tschirnhaus, Michael VON; Maschwitz, Ulrich. Acropyga and Azteca Ants (Hymenoptera: Formicidae) with Scale Insects (Sternorrhyncha: Coccoidea): 20 Million Years of Intimate Symbiosis. American Museum Novitates. 2001, 335: 1–18. ISSN 0003-0082. doi:10.1206/0003-0082(2001)335<0001:AAAAHF>2.0.CO;2.
Johnson, hristine; Agosti, Donat; Delabie, Jacques H.; Dumpert, Klaus; Williams, D. J.; Tschirnhaus, Michael VON; Maschwitz, Ulrich. Acropyga and Azteca Ants (Hymenoptera: Formicidae) with Scale Insects (Sternorrhyncha: Coccoidea): 20 Million Years of Intimate Symbiosis. American Museum Novitates. 2001, 335: 1–18. ISSN 0003-0082. doi:10.1206/0003-0082(2001)335<0001:AAAAHF>2.0.CO;2.