WASET
    Gideon Avigad and  Amiram Moshaiov and  Neima Brauner,  Interactive Concept-based Search using MOEA:The Hierarchical Preferences Case.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    December 2007, vol. 12(12). 593 - 598
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/8910.