@inproceedings{DUXU-UI-2015-HigashidaI,
	author        = "Masanobu Higashida and Toru Ishida",
	booktitle     = "{Proceedings of the Fourth International Conference on Design, User Experience, and Usability. Part II: Users and Interactions}",
	doi           = "10.1007/978-3-319-20898-5_51",
	isbn          = "978-3-319-20897-8",
	pages         = "530--540",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Keyword Input via Digits: Simplified Smartphone Interface for Information Retrieval}",
	volume        = 9187,
	year          = 2015,
}