SWANEPOEL, W.; WYK, A. E. V. Petalidium namibense (Acanthaceae), a new species from Namibia. Phytotaxa, Auckland, New Zealand, v. 671, n. 2, p. 128–138, 2024. DOI: 10.11646/phytotaxa.671.2.2. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.671.2.2. Acesso em: 10 jul. 2025.