Template:Verstraete et al., 2017
- Verstraete, B., Steyn, H.M. & Van Wyk, A.E. 2017. Taxonomic status of some geofrutex members of Vanguerieae (Rubiaceae): notes on Eriosemopsis and Pygmaeothamnus and the description of a new genus Bridsonia. Botanical Journal of the Linnean Society 186(1): 47-65. DOI: 10.1093/botlinnean/box076 PDF on ResearchGate