Amir Alani and  Mojtaba Mahmoodian and  Anna Romanova and  Asaad Faramarzi,  Advanced Numerical and Analytical Methods for Assessing Concrete Sewers and Their Remaining Service Life.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2014, vol. 91(7). 845 - 851
    [viewed 03 March 2021]. Available from: https://publications.waset.org/pdf/10003556.