John McGinn Richard Picking Liz Picking Vic Grout The Use of Interactive Visual Metaphors to Enhance Group Discussions Using Mobile Devices. 952-960 2007 conf/hci/2007-6 HCI (6) http://dx.doi.org/10.1007/978-3-540-73281-5_104 db/conf/hci/hci2007-6.html#McGinnPPG07