Sidharth Talan and  Sanjay Kumar Sharma and  Eoin Joseph Wallace and  Nikita Agrawal,  Utilization of Process Mapping Tool to Enhance Production Drilling in Underground Metal Mining Operations.   journal   = {International Journal of Geological and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    June 2018, vol. 139(7). 470 - 474
    [viewed 01 June 2020]. Available from: https://publications.waset.org/pdf/10009203.