User interface by real and artificial shadow. - Huichuan Xu; Ichi Kanaya; Shinsaku Hiura; Kosuke Sato (SIGGRAPH Research Posters, 2006)

PALMbit-Silhouette: A User Interface by Superimposing Palm-Silhouette to Access Wall Displays. - Goshiro Yamamoto; Huichuan Xu; Kazuto Ikeda; Kosuke Sato (HCI (2), 2009)