Sudha Chinni Johnson P. Thomas Gheorghita Ghinea Zhengming Shen Trust model for certificate revocation in ad hoc networks. 441-457 2008 6 Ad Hoc Networks 3 http://dx.doi.org/10.1016/j.adhoc.2007.03.005 db/journals/adhoc/adhoc6.html#ChinniTGS08