Kareem, B, and HA Owolabi. “Optimizing Maintenance Planning in the Production Industry Using the Markovian Approach”. The Journal of Engineering Research [TJER] 9, no. 2 (December 1, 2012): 46–63. Accessed June 10, 2025. https://journals.squ.edu.om/index.php/tjer/article/view/115.