Yang-Seo Choi Dong-il Seo Sung Won Sohn Sang-Ho Lee Network-Based Real-Time Connection Traceback System (NRCTS) with Packet Marking Technology. 31-40 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2668&spage=31 2003 conf/iccsa/2003-2 ICCSA (2) db/conf/iccsa/iccsa2003-2.html#ChoiSSL03