Masatoshi Arikawa Toru Hayashi Kaoru Sezaki Weblog-based Egocentric Mapping with Track Backs on Spatial Relations. 150-155 2006 AMT conf/amt/2006 db/conf/amt/amt2006.html#ArikawaHS06 http://www.booksonline.iospress.nl/Content/View.aspx?piid=1521