Stir bar-sorptive extraction, solid phase extraction and liquid-liquid extraction for levetiracetam determination in human plasma: comparing recovery rates. Brazilian Journal of Pharmaceutical Sciences, [S. l.], v. 51, n. 2, p. 393–401, 2015. DOI: 10.1590/S1984-82502015000200017. Disponível em: https://www.revistas.usp.br/bjps/article/view/102417.. Acesso em: 5 may. 2024.