@conference {liu2018user,
	title = {User interactions with search systems},
	booktitle = {Proceedings of the 2018 ACM SIGIR International Conference on Theory of Information Retrieval},
	year = {2018},
	pages = {3{\textendash}4},
	author = {Ying-Hsang Liu and Chang Liu and Bierig, Ralf}
}
