Sewon Kim and  Minjun Kwon and  Changyeop Lee,  Low NOx Combustion of Pulverized Petroleum Cokes.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2015, vol. 102(6). 1148 - 1152
    [viewed 01 June 2020]. Available from: https://publications.waset.org/pdf/10002410.