Validation of a gas chromatographic method to quantify sesquiterpenes in copaiba oils - Sousa, João Paulo Barreto de; Brancalion, Ana Paula Santin; Souza, Ariana B.; Turatti, Izabel Cristina Casanova; Ambrosio, Sérgio Ricardo; Furtado, Niege Araçari Jacometti Cardoso; Lopes, Norberto Peporine; Bastos, Jairo Kenupp (Journal of Pharmaceutical and Biomedical Analysis, 2011)