Vijaya K. Srivastava and  Davide Spinello,  Multi-Objective Optimization of Combined System Reliability and Redundancy Allocation Problem.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2019, vol. 152(8). 173 - 178
    [viewed 28 February 2020]. Available from: https://publications.waset.org/pdf/10010655.