WASET
    Ahmed T. Farid and  Muhammed Rizwan,  Prediction of in situ Permeability for Limestone Rock Using Rock Quality Designation Index.   journal   = {International Journal of Geotechnical and Geological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    August 2017, vol. 130(10). 948 - 951
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10007975.