Extended stability study of an extemporaneously analgesic solution of clonidine, ropivacaine and fentanyl. Brazilian Journal of Pharmaceutical Sciences, [S. l.], v. 58, 2023. DOI: 10.1590/s2175-97902022e191121. Disponível em: https://periodicos.usp.br/bjps/article/view/207711.. Acesso em: 2 jun. 2024.