Rocha-Rivera, Hector Fabio, et al. “Incidence of Postoperative Hyponatremia in Neurosurgical Patients in a Hospital in Southern Colombia”. Colombian Journal of Anesthesiology, vol. 46, no. 2, Apr. 2018, pp. 103-11, https://www.revcolanest.com.co/index.php/rca/article/view/186.