WASET
    Luis A. Morales Rosales and  Saul E. Pomares Hernandez and  Gustavo Rodriguez Gomez,  Coordination for Synchronous Cooperative Systems Based on Fuzzy Causal Relations.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2008, vol. 21(9). 664 - 670
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/15857.