Esam Jassim ,  Statistical Modeling of Constituents in Ash  Evolved From Pulverized Coal Combustion.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2014, vol. 86(2). 348 - 352
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/9997509.