@article {liu2019investigation,
	title = {Investigation of users{\textquoteright} knowledge change process in learning-related search tasks},
	journal = {Proceedings of the Association for Information Science and Technology},
	volume = {56},
	number = {1},
	year = {2019},
	pages = {166{\textendash}175},
	publisher = {John Wiley \&amp; Sons, Inc. Hoboken, USA},
	author = {Hanrui Liu and Chang Liu and Belkin, Nicholas J.}
}
