WASET
    Bilal Saeed Raja and  M. Ali Iqbal and  Imran Ihsan,  Moving From Problem Space to Solution Space.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2007, vol. 11(11). 764 - 767
    [viewed 16 April 2024]. Available from: https://publications.waset.org/pdf/2068.