Kilic, E., and M. Ugur. “Can Postoperative Atelectasis Be Prevented by Local Bupivacaine infusion/Infiltration After Emergency Upper Midline Laparotomy? Randomized Clinical Trial”. Annals of Medical Research, vol. 26, no. 9, May 2021, pp. 1820-4, http://www.annalsmedres.org/index.php/aomr/article/view/1731.