M. S. Thakur and  Mohit Shukla,  Practices in Planning, Design and Construction of Head Race Tunnel of a Hydroelectric Project.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    September 2016, vol. 114(6). 818 - 825
    [viewed 06 July 2020]. Available from: https://publications.waset.org/pdf/10005597.