WASET
    O. Farobie and  S S. Achmadi and  L K. Darusman,  Utilization of Glycerol Derived from Jatropha-s Biodiesel Production as a Cement Grinding Aid.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2012, vol. 63(3). 227 - 232
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/1659.