Sporea, I., A. Popescu, D. Sandesc, C. A. Salha, R. Sirli, and M. Danila. “Sedation During Colonoscopy”. Journal of Gastrointestinal and Liver Diseases, vol. 14, no. 2, June 2005, pp. 195-8, https://www.jgld.ro/jgld/index.php/jgld/article/view/2005.2.15.