Determination of ursolic acid from polymeric nanoparticles using high-performance liquid chromatography method - Almeida, Mariana Mandelli de; Bou-Chacra, Nadia Araci; Tavares, Vanessa Franco; Baby, André Rolim; Kaneko, Telma Mary; Velasco, Maria Valéria Robles (Latin American Journal of Pharmacy, 2012)