WASET
    Osama Terra and  Mariesa Nel and  Hatem Hussein,  Bi-Lateral Comparison between NIS-Egypt and NMISA-South Africa for the Calibration of an Optical Time Domain Reflectometer.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2016, vol. 120(12). 675 - 679
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10006183.