P. Gilbertson, P. Coulton, and F. Chehimi, Using ?tilt? as an interface to control ?no-button? 3-D mobile games, Computers in Entertainment, vol.6, issue.3, 2008.
DOI : 10.1145/1394021.1394031

P. Parhi and A. Karlson, Target size study for one-handed thumb use on small touchscreen devices, Proceedings of the 8th conference on Human-computer interaction with mobile devices and services , MobileHCI '06, pp.203-210, 2006.
DOI : 10.1145/1152215.1152260
URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.495.2332