Masayuki Tani Masato Horita Kimiya Yamaashi Koichiro Tanikoshi Masayasu Futakawa Courtyard: integrating shared overview on a large screen and per-user detail on individual screens. 44-50 1994 conf/chi/1994 CHI http://doi.acm.org/10.1145/191666.191690 db/conf/chi/chi1994.html#TaniHYTF94a