Esmailian, M., M. Koushkian Esfahani, and F. Heydari. “The Effect of Low-Dose Ketamine in Treating Acute Asthma Attack; A Randomized Clinical Trial”. Archives of Academic Emergency Medicine, vol. 6, no. 1, Nov. 2018, p. e21, doi:10.22037/aaem.v6i1.64.