Omid Adibi and  Nategheh Najafpour and  Bijan Farhanieh and  Hossein Afshin,  Determination of Safety Distance Around Gas Pipelines Using Numerical Methods.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2018, vol. 134(2). 120 - 124
    [viewed 22 November 2019]. Available from: https://publications.waset.org/pdf/10008545.