1. Ahuja, N. J., & Sille, R. (2014). A critical review of development of intelligent tutoring systems: Retrospect, present and prospect. International Journal of Computer Science Issues (IJCSI), 10(4), 39.
2. Akbulut, Y., & Cardak, C. S. (2012). Adaptive educational hypermedia accommodating learning styles: A content analysis of publications from 2000 to 2011. Computers and Education, 58(2), 835–842
3. Aleven, V., Mclaren, B. M., Roll, I., & Koedinger, K. R. (2006). Toward meta-cognitive tutoring: A model of help seeking with a cognitive tutor. International Journal of Artificial Intelligence in Education, 16(2), 101–128
4. Aleven, V., Mclaren, B. M., Sewall, J., & Koedinger, K. R. (2009). A new paradigm for intelligent tutoring systems: Example-tracing tutors. International Journal of Artificial Intelligence in Education, 19(2), 105–154
5. Almasri, A., Ahmed, A., Al-Masri, N., Abu Sultan, Y., Mahmoud, A. Y., Zaqout, I., Akkila, A. N., & Abu-Naser, S. S. (2019). Intelligent tutoring systems survey for the period 2000–2018. International Journal of Academic Engineering Research (IJAER), 3(5), 21–37