A. Sinha, Z. Shen, Y. Song, H. Ma, D. Eide, B. Hsu, and K. Wang. Proceedings of the 24th International Conference on World Wide Web, page 243--246. Republic and Canton of Geneva, Switzerland, International World Wide Web Conferences Steering Committee, (2015)
H. Zhang, A. Santos, and J. Freire. Proceedings of the 30th ACM International Conference on Information &$\mathsemicolon$ Knowledge Management, ACM, (October 2021)