In-vitro trypanocidal activity evaluation of crude extract and isolated compounds from Baccharis dracunculifolia D. C. (Asteraceae) - Silva Filho, Ademar Alves da; Bueno, Paula Carolina Pires; Gregorio, Luís Elídio; Andrade e Silva, Márcio Luís; Albuquerque, Sérgio de; Bastos, Jairo Kenupp (Journal of Pharmacy and Pharmacology, 2004)