Yi, Kwan, and Jamshid Beheshti. “A Comparative Study on Feature Selection of Text Categorization for Hidden Markov Models”. Proceedings of the Annual Conference of CAIS / Actes du congrès annuel de l’ACSI00 (October 15, 2013). Accessed October 21, 2020. https://journals.library.ualberta.ca/ojs.cais-acsi.ca/index.php/cais-asci/article/view/341.