ISO 9241-9 evaluation of video game controllers. - Daniel Natapov; Steven J. Castellucci; I. Scott MacKenzie (Graphics Interface, 2009)

Gameplay evaluation of the trackball controller. - Daniel Natapov; I. Scott MacKenzie (Future Play, 2010)

The trackball controller: improving the analog stick. - Daniel Natapov; I. Scott MacKenzie (Future Play, 2010)

Touchscreens vs. traditional controllers in handheld gaming. - Loutfouz Zaman; Daniel Natapov; Robert J. Teather (Future Play, 2010)

Evaluating haptic feedback in virtual environments using ISO 9241-9. - Robert J. Teather; Daniel Natapov; Michael Jenkin (VR, 2010)