IMPAD: an inexpensive multi-touchpressure acquisition device. - Ilya D. Rosenberg; Alexander Grau; Charles Hendee; Nadim Awad; Ken Perlin (CHI Extended Abstracts, 2009)

The UnMousePad: the future of touch sensing. - Ilya D. Rosenberg; Ken Perlin; Charles Hendee; Alex M. Grau; Nadim Awad (SIGGRAPH Emerging Technologies, 2009)