A Method to Extend Functionality of Pointer Input Devices. - Oleg Gusyatin; Mikhail Urinson; Margrit Betke (User Interfaces for All, 2004)

Symbol design: a user-centered method to design pen-based interfaces and extend the functionality of pointer input devices. - Margrit Betke; Oleg Gusyatin; Mikhail Urinson (Univers. Access Inf. Soc., 2006)