Mehmet Gokturk, John L. Sibert. An analysis of the index finger as a pointing device. In Michael E. Atwood, editor, CHI '99 Extended Abstracts on Human Factors in Computing Systems, CHI Extended Abstracts '99, Pittsburgh, Pennsylvania, USA, May 15-20, 1999. pages 286-287, ACM, 1999. [doi]
Abstract is missing.