J. Lin, R. Nogueira, and A. Yates. (2020)cite arxiv:2010.06467Comment: Final preproduction version of volume in Synthesis Lectures on Human Language Technologies by Morgan & Claypool.
X. Lin, D. Soergel, and G. Marchionini. SIGIR '91: Proceedings of the 14th annual international ACM SIGIR conference on Research and development in information retrieval, page 262--269. New York, NY, USA, ACM, (1991)