Cheng Seong Khor and  Xiao Qi Yeoh,  Optimization of Petroleum Refinery Configuration Design with Logic Propositions.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2010, vol. 44(8). 453 - 456
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/889.