Esmailian, M., R. Moshiri, and M. Zamani. “Comparison of the Analgesic Effect of Intravenous Acetaminophen and Morphine Sulfate in Rib Fracture; A Randomized Clinical Trial”. Archives of Academic Emergency Medicine, vol. 3, no. 3, Dec. 2018, pp. 99-102, doi:10.22037/aaem.v3i3.277.