WASET
    B. Vahdani and  R. Tavakkoli-Moghaddam and  A. Baboli and  S. M. Mousavi,  A New Fuzzy Mathematical Model in Recycling Collection Networks: A Possibilistic Approach.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2013, vol. 78(6). 1252 - 1260
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/2994.