CHEN, J.; NG, X. Y.; WONG, K. M. Two new combinations in Pitardella (Rubiaceae) and first record of the genus in the Malay Peninsula. Phytotaxa, Auckland, New Zealand, v. 664, n. 2, p. 146–150, 2024. DOI: 10.11646/phytotaxa.664.2.7. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.664.2.7. Acesso em: 6 dec. 2025.