Yetkin, M. E., Simsir, F., Ozfirat, M. K., Ozfirat, P. M., & Yenice, H. (2016). A FUZZY APPROACH TO SELECTING ROOF SUPPORTS IN LONGWALL MINING. The South African Journal of Industrial Engineering, 27(1), 162–177. https://doi.org/10.7166/27-1-1366