Wensheng Zhang Sencun Zhu Guohong Cao Predistribution and local collaboration-based group rekeying for wireless sensor networks. 1229-1242 2009 7 Ad Hoc Networks 6 http://dx.doi.org/10.1016/j.adhoc.2008.11.004 db/journals/adhoc/adhoc7.html#ZhangZC09