Trypanocidal activity of Piper arboreum and Piper tuberculatum (Piperaceae) - Regasini, Luis Octávio; Silva, Fernando Cotinguiba da; Passerini, Gabriela Duó; Bolzani, Vanderlan da Silva; Cicarelli, Regina Maria Barretto; Kato, Massuo Jorge; Furlan, Maysa (Revista Brasileira de Farmacognosia, 2009)