@inproceedings{CHI-2009-LeeZ,
	author        = "Seungyon Lee and Shumin Zhai",
	booktitle     = "{Proceedings of the 27th ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/1518701.1518750",
	isbn          = "978-1-60558-246-7",
	pages         = "309--318",
	publisher     = "{ACM}",
	title         = "{The performance of touch screen soft buttons}",
	year          = 2009,
}