Ioannis Chatzigiannakis Elisavet Konstantinou Vasiliki Liagkou Paul G. Spirakis Agent-based Distributed Group Key Establishment in Wireless Sensor Networks. 1-6 2007 conf/wowmom/2007 WOWMOM http://dx.doi.org/10.1109/WOWMOM.2007.4351807 db/conf/wowmom/wowmom2007.html#ChatzigiannakisKLS07