Youngsoo Kim Jonggu Kang Daeyoung Kim Eunjo Kim Pohkit Chong Suckbin Seo Design of a fence surveillance system based on wireless sensor networks. 4 2008 Autonomics http://doi.acm.org/10.1145/1487652.1487656 conf/autonomics/2008 db/conf/autonomics/autonomics2008.html#KimKKKCS08