WASET
    Aseem Rajvanshi and  Pankaj Kumar Pandey,  Lubricating Grease from Waste Cooking Oil and Waste Motor Sludge.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2016, vol. 117(9). 1220 - 1223
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10005558.