WASET
    S.H. Nasseri and  E. Ardil,  Simplex Method for Fuzzy Variable Linear Programming Problems.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2009, vol. 34(10). 884 - 888
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/4359.