Sirui Yang Hai Jin Xiaofei Liao Hong Yao OnRipple: A Distributed Overlay Framework for Targeted Immunization in Large-Scale Networks. 911-916 2007 SNPD (3) http://doi.ieeecomputersociety.org/10.1109/SNPD.2007.400 conf/snpd/2007 db/conf/snpd/snpd2007-3.html#YangJLY07