G. Ramesh and  S. Sundara Vadivelu,  Fault Localization and Alarm Correlation in Optical WDM Networks.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2010, vol. 37(1). 114 - 119
    [viewed 14 October 2019]. Available from: https://publications.waset.org/pdf/11580.