Gupta, B., S. Gurunath, A. Bahadur, B. Gupta, J. Sharma, and S. Mittal. “Effect of Topical Lignocaine on Postoperative Pain After Laparoscopic Tubal Sterilisation in Awake Patients”. South African Journal of Obstetrics and Gynaecology, vol. 17, no. 3, Oct. 2011, pp. 68-70, https://www.ajol.info/index.php/sajog/article/view/70537.