L. Bertola and  T. Cox and  P. Wheeler and  S. Garvey and  H. Morvan,  Reducing Weight and Fuel Consumption of Civil Aircraft by EML.   journal   = {International Journal of Aerospace and Mechanical Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 122(2). 236 - 240
    [viewed 28 September 2020]. Available from: https://publications.waset.org/pdf/10006249.