M. . Okoh, J. O. OWOLABI, and P. E. EGBOR, “Comparison of Pre-emptive Analgesic Effect of Paracetamol, Ibuprofen, and Placebo in Reducing Post-operative Pain in Intra-alveolar Tooth Extraction at The University of Benin Teaching Hospital, Benin City. A Randomised Trial.: Pre-emptive analgesic effect of paracetamol and ibuprofen in tooth extraction. ”, N.D.J, vol. 32, no. 1, Mar. 2024.