G. Kumar, C. Shu-Lyn, G. Win, L. Sie, N. F. Lakman, and N. Haque, “Comparison between preoperative and post-operative administration of paracetamol, ibuprofen and mefenamic acid for post-extraction pain control”, BMRAT, vol. 7, no. 5, pp. 3794-3798, May 2020.