A. Zubiaga, C. Körner, and M. Strohmaier. Proceedings of the 22nd ACM conference on Hypertext and hypermedia, page 93--102. New York, NY, USA, ACM, (2011)
A. Zimdars, D. Chickering, and C. Meek. UAI '01: Proceedings of the 17th Conference in Uncertainty in Artificial Intelligence, page 580--588. San Francisco, CA, USA, Morgan Kaufmann Publishers Inc., (2001)
Z. Zhang, X. Han, Z. Liu, X. Jiang, M. Sun, and Q. Liu. Proceedings of the 57th Annual Meeting of the Association for Computational Linguistics, page 1441--1451. Florence, Italy, Association for Computational Linguistics, (July 2019)