An alternative to push, press, and tap-tap-tap: gesturing on an isometric joystick for mobile phone text entry.

Jacob O. Wobbrock Duen Horng Chau Brad A. Myers An alternative to push, press, and tap-tap-tap: gesturing on an isometric joystick for mobile phone text entry. 667-676 2007 conf/chi/2007 CHI http://doi.acm.org/10.1145/1240624.1240728 db/conf/chi/chi2007.html#WobbrockCM07