Toro Tobar, R. A., B. L. Avendaño Prieto, and D. A. Castrillón. “Design and Psychometric Analysis of the Hopelessness and Suicide Ideation Inventory ‘IDIS’”. International Journal of Psychological Research, vol. 9, no. 1, Jan. 2016, pp. 52-63, doi:10.21500/20112084.2100.