Naomi Yamashita Keiji Hirata Shigemi Aoyagi Hideaki Kuzuoka Yasunori Harada Impact of seating positions on group video communication. 177-186 2008 CSCW http://doi.acm.org/10.1145/1460563.1460591 conf/cscw/2008 db/conf/cscw/cscw2008.html#YamashitaHAKH08