ESCOBAR GARCÍA, P.; HILLE, A.; LUCAS, E.; RAINER, H. The Otto C. Berg types at the Natural History Museum, Vienna. Phytotaxa, Auckland, New Zealand, v. 228, n. 1, p. 1–66, 2015. DOI: 10.11646/phytotaxa.228.1.1. Disponível em: https://phytotaxa.mapress.com/pt/article/view/phytotaxa.228.1.1. Acesso em: 5 dec. 2025.