Deqing Zou Laurence Tianruo Yang Weizhong Qiang Xueguang Chen Zongfen Han An Authentication and Access Control Framework for Group Communication Systems in Grid Environment. 547-554 2007 conf/aina/2007 AINA http://doi.ieeecomputersociety.org/10.1109/AINA.2007.33 db/conf/aina/aina2007.html#ZouYQCH07