Zarita Zainuddin and  Kumatha Thinakaran and  Mohammed Shuaib,  Simulation of the Pedestrian Flow in the Tawaf Area Using the Social Force Model.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    December 2010, vol. 48(12). 1489 - 1494
    [viewed 11 May 2021]. Available from: https://publications.waset.org/pdf/11179.