PUCs: detecting transparent, passive untouched capacitive widgets on unmodified multi-touch displays. - Simon Voelker; Kosuke Nakajima; Christian Thoresen; Yuichi Itoh; Kjell Ivar Øvergård; Jan O. Borchers (ITS, 2013)

PUCs demo: detecting transparent, passive untouched capacitive widgets. - Simon Voelker; Kosuke Nakajima; Christian Thoresen; Yuichi Itoh; Kjell Ivar Øvergård; Jan O. Borchers (ITS, 2013)

PERCs: Persistently Trackable Tangibles on Capacitive Multi-Touch Displays. - Simon Voelker; Christian Cherek; Jan Thar; Thorsten Karrer; Christian Thoresen; Kjell Ivar Øvergård; Jan O. Borchers (UIST, 2015)