1. Belkin, N. J. (1980). Anomalous states of knowledge as a basis for information retrieval. Canadian Journal of Information Science, 5(1), 133–143.
2. Choi, E., He, H., Iyyer, M., Yatskar, M., Yih, W., Choi, Y., Liang, P., & Zettlemoyer, L. (2018). QuAC: Question answering in context. In Proceedings of the 2018 conference on empirical methods in natural language processing, Brussels, Belgium, October 31–November 4, 2018 (pp. 2174–2184). Association for Computational Linguistics.
3. Clarke, C. L. A. (2019). WaterlooClarke at the TREC 2019 conversational assistant track. In E. M. Voorhees & A. Ellis (Eds.), Proceedings of the twenty-eighth Text REtrieval Conference, TREC 2019, Gaithersburg, Maryland, USA, November 13–15, 2019. NIST Special Publication (Vol. 1250). National Institute of Standards and Technology (NIST).
4. Croft, W. B., & Thompson, R. H. (1987). I3R: A new approach to the design of document retrieval systems. JASIST, 38(6), 389–404.
5. Culpepper, J. S., Diaz, F., & Smucker, M. D. (2018). Research frontiers in information retrieval: Report from the third strategic workshop on information retrieval in Lorne (SWIRL 2018). SIGIR Forum, 52(1), 34–90.