Carmo, J. A. M. et al. (2023) «There and back again: molecular phylogenetics of the Brazilian endemic Psyllocarpus (Rubiaceae: Spermacoceae) supports a circumscription of the genus based on its original concept», Bonplandia, 32, p. 5. Disponible en: https://revistas.unne.edu.ar/index.php/bon/article/view/6942 (Accedido: 27 marzo 2026).