Mohammad Reza Kangavari and  Samira Ghandchi and  Manak Golpour,  Information Retrieval: Improving Question Answering Systems by Query Reformulation and Answer Validation.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    December 2008, vol. 24(12). 1275 - 1282
    [viewed 02 May 2024]. Available from: https://publications.waset.org/pdf/13824.