@inproceedings{HCI-UC-2013-TajimaIK,
	author        = "Terumasa Tajima and Yusuke Iida and Toshikazu Kato",
	booktitle     = "{Proceedings of the 15th International Conference on Human-Computer Interaction. Part III: Users and Contexts of Use}",
	doi           = "10.1007/978-3-642-39265-8_52",
	isbn          = "978-3-642-39264-1",
	pages         = "466--474",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Analysis of Customer Preference through Unforced Natural Passive Observation}",
	volume        = 8006,
	year          = 2013,
}