Coelho, A. M., J. A. Paiva, and F. Sales. “Exploring Seed Morphology of Polygala s.s. (Polygalaceae) for Taxonomic Purposes: A Case Study of the Angolan Taxa”. Phytotaxa, vol. 776, no. 3, Sept. 2026, pp. 201-42, doi:10.11646/phytotaxa.776.3.1.