Habr-Gama, Angelita, et al. “ Bowel Preparation for Colonoscopy: Comparison of Mannitol and Sodium Phosphate. Results of a Prospective Randomized Study ”. Revista Do Hospital Das Clínicas, vol. 54, no. 6, Dec. 1999, pp. 187-92, https://doi.org/10.1590/S0041-87811999000600004.