WASET
    P. Góes and  J. Manzi,  Energy Efficiency Index Applied to Reactive Systems.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2016, vol. 115(7). 1343 - 1346
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10005315.