Reza Ghaemi and  Amin Milani Fard and  Hamid Tabatabaee and  Mahdi Sadeghizadeh,  Evolutionary Query Optimization for Heterogeneous Distributed Database Systems.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    July 2008, vol. 19(7). 2305 - 2311
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/12865.