Anatomical Characters of the Medicinal Leaf and Stem of Gymnanthemum Amygdalinum (Delile) Sch.Bip. Ex Walp. (Asteraceae) . Braz. J. Pharm. Sci. 2013, 49 (4), 719-727. https://doi.org/10.1590/S1984-82502013000400011.