V. S. Kottareddygari, S. C. A., A. Baig, S. N., and S. P. N., “Effectiveness of transdermal NSAID administration in analgesia for rib fracture patients: a comparative study with intravenous NSAID administration”, Int Surg J, vol. 5, no. 5, pp. 1856–1859, Apr. 2018.