WASET
    Rezki Akkal and  Mohamed Khodja and  Slimane Azzi,  Alternative Acidizing Fluids and Their Impact on the Southern Algerian Shale Formations.   journal   = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2018, vol. 139(7). 508 - 512
    [viewed 23 April 2024]. Available from: https://publications.waset.org/pdf/10009318.