Evaluation of the effect of aqueous extract of Croton urucurana baillon (Euphorbiaceae) on the hemorrhagic activity induced by the venom of Bothrops jararaca, using new techniques to quantify hemorrhagic activity in rat skin - Esmeraldino, Luis Everton; Souza, Ana Maria de; Sampaio, Suely Vilela (Phytomedicine, 2005)