Bello, A. O., J. S. Boatwright, M. V. D. Bank, and A. R. Magee. “The Cape Gum-Bushes: a Taxonomic Revision of Pteronia (Astereae, Asteraceae)”. Phytotaxa, vol. 764, no. 1, June 2026, pp. 1-168, doi:10.11646/phytotaxa.764.1.1.