Haeryong Park Seongan Lim Ikkwon Yie Hyun Kim Kilsoo Chun Jaeil Lee An Information Aggregation Scheme of Multi-node in Ubiquitous Sensor Networks. 60-68 2007 conf/ispa/2007w ISPA Workshops http://dx.doi.org/10.1007/978-3-540-74767-3_7 db/conf/ispa/ispa2007w.html#ParkLYKCL07