Jerry Cheng Hao Yang Starsky H. Y. Wong Petros Zerfos Songwu Lu Design and Implementation of Cross-Domain Cooperative Firewall. 284-293 2007 ICNP http://dx.doi.org/10.1109/ICNP.2007.4375859 conf/icnp/2007 db/conf/icnp/icnp2007.html#ChengYWZL07