Minsoo Lee and  Yun-mi Kim and  Yoon-kyung Lee,  A Two-Step Approach for Tree-structured XPath Query Reduction.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2007, vol. 10(10). 3342 - 3347
    [viewed 27 October 2021]. Available from: https://publications.waset.org/pdf/12893.