Alfred Hasanaj and  Ardit Gjeta and  Miranda Kullolli,  Analyzing Defects with Failure Assessment Diagrams of Gas Pipelines.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2014, vol. 89(5). 1045 - 1047
    [viewed 21 February 2020]. Available from: https://publications.waset.org/pdf/9998748.