WASET
    Alicia Y. C. Tang and  Sharifuddin M. Zain and  Noorsaadah A. Rahman and  Rukaini Abdullah,  Deriving Causal Explanation from Qualitative Model Reasoning.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2009, vol. 35(11). 608 - 615
    [viewed 28 March 2024]. Available from: https://publications.waset.org/pdf/1208.