WASET
    Takeru YOKOI and  Hidekazu YANAGIMOTO and  Sigeru OMATU,  Information Filtering using Index Word Selection based on the Topics.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    February 2009, vol. 26(2). 276 - 282
    [viewed 26 April 2024]. Available from: https://publications.waset.org/pdf/14748.