Carmo, J. A. M., M. Reginato, S. V. Sobrado, L. M. Miguel, S. B. Janssens, S. Dessein, R. M. Salas, e A. O. Simoes. “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, vol. 32, outubro de 2023, p. 5, https://revistas.unne.edu.ar/index.php/bon/article/view/6942.