DARBYSHIRE, I.; LANGA, C.; ROMEIRAS, M. M. A synopsis of <em>Polysphaeria </em>(Rubiaceae) in Mozambique, including two new species. Phytotaxa, [S. l.], v. 414, n. 1, p. 1–18, 2019. DOI: 10.11646/phytotaxa.414.1.1. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.414.1.1. Acesso em: 14 feb. 2025.