Krombein, K.V., Norden, B.B., Rickson, M.M. & Rickson, F.R. (1999). Biodiversity of domatia occupants (ants, wasps, bees, and others) of the Sri Lankan myrmecophyte Humboldtia laurifolia Vahl (Fabaceae). Smithsonian Contributions to Zoology 603: 1–34.
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