Sobrado, S.V., do Carmo, J.A., Simões, A.O. and 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 (Mar. 2022), 161–176. DOI:https://doi.org/10.5852/ejt.2022.806.1713.