Mojtaba Heydarizad,  Studying the Spatial Variations of Stable Isotopes (18O and 2H) in Precipitation and Groundwater Resources in Zagros Region.   journal   = {International Journal of Geotechnical and Geological Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2019, vol. 156(12). 685 - 688
    [viewed 27 February 2020]. Available from: https://publications.waset.org/pdf/10010947.