Akio Koyama Yosuke Takenaka Junpei Arai Leonard Barolli A Care Communication System with Space Sharing Function. 1042-1048 2008 AINA http://doi.ieeecomputersociety.org/10.1109/AINA.2008.20 conf/aina/2008 db/conf/aina/aina2008.html#KoyamaTAB08