Marilyn Lim Chien Hui and  Nabil Elmarzouqi and  Chan Huah Yong,  A Context-Aware based Authorization System for Pervasive Grid Computing.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2011, vol. 50(2). 157 - 165
    [viewed 17 February 2020]. Available from: https://publications.waset.org/pdf/13572.