Sobrado, S. V., do Carmo, J. A., Simões, A. O., & Salas, R. M. (2022). Two new species of Psyllocarpus (Spermacoceae, Rubiaceae) from the state of Minas Gerais, southeastern Brazil. European Journal of Taxonomy, 806(1), 161–176. https://doi.org/10.5852/ejt.2022.806.1713