Yueh-Hua Lee Alex Thomo Kui Wu Valerie King Scalable Ubiquitous Data Access in Clustered Sensor Networks. 533-540 2008 SSDBM http://dx.doi.org/10.1007/978-3-540-69497-7_35 conf/ssdbm/2008 db/conf/ssdbm/ssdbm2008.html#LeeTWK08