Yoh Shiraishi Niwat Thepvilojanapong Yosuke Tamura Tatsuro Endo Koichi Yamada Nayuta Ishii Hiroki Ishizuka Keisuke Kanai Yoshito Tobe TomuDB: multi-resolution queries in heterogeneous sensor networks through overlay network. 419-420 2007 SenSys http://doi.acm.org/10.1145/1322263.1322325 conf/sensys/2007 db/conf/sensys/sensys2007.html#ShiraishiTTEYIIKT07