كيخيا م., سعيد ن., and شعبان ن. “Difficulties Experienced by School Principals in the Interior and Exterior Engineering Spaces of the School Building”. Tishreen University Journal -Engineering Sciences Series, vol. 44, no. 1, Mar. 2022, pp. 283-96, https://journal.tishreen.edu.sy/index.php/engscnc/article/view/12042.