Non-Keyboard QWERTY Touch Typing: A Portable Input Interface for The Mobile User. - Mikael Goldstein; Robert Book; Gunilla Alsiö; Silvia Tessa (CHI, 1999)

Mental effort increases when adding a voice control feature to a familiar interface. - Robert Book; Mikael Goldstein (HCI (2), 1999)

Usability evaluation of a high-fidelity smart phone prototype: task navigation depth affects effectiveness. - Mikael Goldstein; Mikael Anneroth; Robert Book (HCI (2), 1999)