Mohammed El Amine Abderrahim,  Query Reformulation Guided by External Resource for Information Retrieval.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2013, vol. 76(4). 522 - 526
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/9996934.