ZHU, T.; ROW, K.H. An Anion Exchange Monolithic Cartridge for Extraction and Analysis of Oleanolic Acid from Oldenlandia diffusa. Asian Journal of Chemistry, [S. l.], v. 25, n. 6, p. 3008–3010, 2013. DOI: 10.14233/ajchem.2013.13478. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/25_6_16. Acesso em: 21 jul. 2024.