Sharifi, Mani, Arefe Shojaie, Sajjad Naserkhaki, and Mohammadreza Shahriari. 2018. “A BI-OBJECTIVE REDUNDANCY ALLOCATION PROBLEM WITH TIME-DEPENDENT FAILURE RATES”. International Journal of Industrial Engineering: Theory, Applications and Practice 25 (4). https://doi.org/10.23055/ijietap.2018.25.4.1722.