Rodrigo Fernandes Correa, and Acires Dias. “Mathematical Modeling for Optimization of Periodicity in the Preventive Maintenance Plans”. Global Journals of Research in Engineering 20, no. A1 (January 15, 2020): 45–56. Accessed May 7, 2024. https://engineeringresearch.org/index.php/GJRE/article/view/2034.