WASET
    W. Schellong,  Energy Efficiency Analysis of Crossover Technologies in Industrial Applications.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2018, vol. 138(6). 597 - 602
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10009048.