Hyoungil Jeong, Youngjoong Ko and Jungyun Seo.
   "Statistical Text Summarization Using a Category-based Language Model on a Bootstrapping Framework.
    International Journal on Artificial Intelligence Tools, May 2018.
   (SCIE, ISSN 0218-2130)

Changsu Lee and Youngjoong Ko.
   "Spoken Language Understanding with a Novel Simultaneous Recognition Technique    for the Intelligent Personal Assistant Software."
    International Journal on Artificial Intelligence Tools, May 2018.
   (SCIE, ISSN 0218-2130)