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 20 September 2024]. Available from: https://publications.waset.org/pdf/13824.