M. Dawood, L., May G. Kassir, and Fadhil N. Mahan. “Study of Using Weighting Property Index for Selecting the Best Maintenance Management System (MMS) at Power Plants”. Diyala Journal of Engineering Sciences, vol. 11, no. 4, Dec. 2018, pp. 20-27, doi:10.24237/djes.2018.11404.