Brain Vetter Feiyi Wang Shyhtsun Felix Wu An experimental study of insider attacks for OSPF routing protocol. 293-300 1997 conf/icnp/1997 ICNP http://doi.ieeecomputersociety.org/10.1109/ICNP.1997.643735 db/conf/icnp/icnp1997.html#VetterWW97