WASET
    Banti Sidhiwala and  T. C. S. M. Gupta,  Gassing Tendency of Natural Ester Based Transformer Oils: Low Ethane Generation in Stray Gassing Behavior.   journal   = {International Journal of Materials and Metallurgical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2023, vol. 201(9). 105 - 108
    [viewed 27 April 2024]. Available from: https://publications.waset.org/pdf/10013243.