Haque, M. A., M. Hussain, and J. A. Usmani. “A Bizarre Case Report of Self-Harm by Ingested Lock Trapped in Oropharynx”. International Journal of Research in Medical Sciences, vol. 3, no. 4, Jan. 2017, pp. 1015-7, https://www.msjonline.org/index.php/ijrms/article/view/1433.