Bolaños-Arboleda, Diana, et al. “Etilefrine Vs. Phenylephrine for Hypotension During Spinal Anesthesia for Cesarean Section: Multicenter, Randomized, Double Blind Controlled Clinical Trial”. Colombian Journal of Anesthesiology, vol. 44, no. 2, Apr. 2016, pp. 89–96, https://www.revcolanest.com.co/index.php/rca/article/view/449.