@inproceedings{CHI-2009-ChoiK,
	author        = "Minwoo Choi and Gerard Jounghyun Kim",
	booktitle     = "{Proceedings of the 27th ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/1518701.1518936",
	isbn          = "978-1-60558-246-7",
	pages         = "1535--1538",
	publisher     = "{ACM}",
	title         = "{TouchBall: a design and evaluation of a hand-held trackball based touch-haptic interface}",
	year          = 2009,
}