WASET
    Changwoo Byun and  Kyounghan Lee and  Seog Park,  A Keyword-Based Filtering Technique of Document-Centric XML using NFA Representation .   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    March 2007, vol. 3(3). 539 - 546
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/12459.