Wen-Lung Huang and  Shih-Pin Chen,  Optimal Aggregate Production Planning with Fuzzy Data.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2012, vol. 68(8). 1633 - 1638
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/7854.