Loai Nasrat and  Mervat S. Hassan,  Effect of Bentonite on the Properties of Liquid Insulating Oil.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2012, vol. 68(8). 704 - 710
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/12227.