WASET
    Nooshin Salari and  Viliam Makis and  Jane Doe,  Optimal Opportunistic Maintenance Policy for a Two-Unit System.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2017, vol. 126(6). 1195 - 1199
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10007253.