“A study of the phytotoxic effects of the aerial parts of Senecio westermanii Dusén (Asteraceae) on Lactuca sativa L. and Allium cepa L. seeds”, Braz. J. Pharm. Sci., vol. 54, no. 3, p. e17135, Nov. 2018, doi: 10.1590/s2175-97902018000317135.