Lack of analgesic property in xanthium strumarium Linn. Fruit’s butanolic extracts . Journal of Pharmaceutical Negative Results, [S. l.], v. 3, n. 1, p. 22–25, 2012. Disponível em: https://www.pnrjournal.com/index.php/home/article/view/47.. Acesso em: 7 jun. 2026.