Enshassi, Adnan, et al. “Factors Affecting Safety Performance in Repair, Maintenance, Alteration, and Addition (RMAA) Projects”. International Journal of Sustainable Construction Engineering and Technology, vol. 5, no. 2, Nov. 2014, pp. 25-38, https://publisher.uthm.edu.my/ojs/index.php/IJSCET/article/view/958.