Use of Intravenous Clonidine Vs Placebo for Prolonging Spinal Anaesthesia. Global Journal of Medical Research, [S. l.], v. 14, n. I1, p. 35–39, 2014. Disponível em: https://medicalresearchjournal.org/index.php/GJMR/article/view/532. Acesso em: 23 jan. 2026.