Su Cheng Haw and G. S. V. Radha Krishna Rao, Query Optimization Techniques for XML Databases. journal = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology. October 2008, vol. 22(10). 3612 - 3619 [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/3191.