Sudarssan Subramaniam Gouthaman, Janani Kandamani, Divya Sanjeevi Ramakrishnan, and Abdul Wahab P U, “Effect of premedication with oral clonidine on intraoperative blood loss during rhinoplasty surgery - A systematic review”, Int. J. Res. Pharm. Sci., vol. 11, no. 4, pp. 5206–5213, Oct. 2020.