WASET
    Seongmin Yim,  Technology Trend and Level Assessment Using Patent Data for Preliminary Feasibility Study on R and D Program.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2012, vol. 71(11). 1336 - 1338
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/235.