Hedyotis, Oldenlandia and related genera (Rubiaceae: Spermacoceae) in Australia: new genera and new combinations in an Asian-Australian-Pacific lineage.

Gibbons, K. L., (2020). Taxon 69(3), 515-542. Wiley, Hoboken, USA. English language

Phylogeny of Hedyotis L. (Rubiaceae: Spermacoceae): redefining a complex Asian-Pacific assemblage.

Wikström, N., Neupane, S., Kårehed, J., Motley, T. J., Bremer, B., (2013). Taxon 62(2), 357-374. International Association for Plant Taxonomy, Vienna, Austria. English language