Greeshma Sharma and  Sushil Chandra and  Vijander Singh and  Alok Prakash Mittal,  The Role of Planning and Memory in the Navigational Ability.   journal   = {International Journal of Cognitive and Language Sciences}, [online]. World Academy of Science, Engineering and Technology.
    October 2016, vol. 120(12). 3882 - 3885
    [viewed 16 May 2021]. Available from: https://publications.waset.org/pdf/10005905.