“Phytochemical and morpho-anatomical study of the vegetative organs of Psychotria fractistipula L.B.Sm., R.M. Klein & Delprete (Rubiaceae)”, Braz. J. Pharm. Sci., vol. 56, p. e18158, Dec. 2020, doi: 10.1590/s2175-97902020000118158.