Syed, Col Iffat Batool, et al. “CORRELATION OF UPPER AIRWAY SPACE AND MAXILLARY INTERMOLAR WIDTH: Upper Airway Space and Maxillary Intermolar Width”. Pakistan Armed Forces Medical Journal, vol. 60, no. 1, Mar. 2010, pp. 123-5, https://pafmj.org/PAFMJ/article/view/477.