José Floriano Barêa Pastore, and Guilherme Medeiros Antar. 2021. “Two New Endangered Species of Polygala Series Trichospermae (Polygalaceae), Endemic to the Cerrado Domain, Tocantins State, Brazil”. European Journal of Taxonomy 762 (1):133-48. https://doi.org/10.5852/ejt.2021.762.1459.