Nadjafi, B. A., Pourbakhsh, H., Mirhabibi, M., Khodaei, H., Ghodami, B., Sadighi, F., & Azizi, S. (2019). Economic production quantity model with backorders and items with imperfect/perfect quality options. Journal of Applied Research and Technology, 17(4). https://doi.org/10.22201/icat.16656423.2019.17.4.794