WASET
    Bashar Mudhaffar Abdullah and  Jumat Salimon,  Optimization of Process Parameters for Diesters Biolubricant using D-optimal Design.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2011, vol. 56(8). 691 - 699
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/226.