Sagástegui Alva, Abundio, and Eric F. Rodríguez Rodríguez. “New Species of Ophryosporus (Eupatorieae Asteraceae) from Peru”. Revista Peruana de Biología 15, no. 1 (April 14, 2008): 21–23. Accessed June 2, 2025. https://revistasinvestigacion.unmsm.edu.pe/index.php/rpb/article/view/1664.