WASET
    Haibo Hu and  Hong Xiang,  Implicit Authorization Mechanism of Object-Oriented Database.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2010, vol. 38(2). 278 - 283
    [viewed 09 May 2024]. Available from: https://publications.waset.org/pdf/13652.