"Backdoors and Trojan Horses: By the Internet Security Systems' X-Force". Information Security Technical Report. 6 (4): 31–57. 2001-12-01. doi:10.1016/S1363-4127(01)00405-8. ISSN1363-4127.
"Backdoors and Trojan Horses: By the Internet Security Systems' X-Force". Information Security Technical Report. 6 (4): 31–57. 2001-12-01. doi:10.1016/S1363-4127(01)00405-8. ISSN1363-4127.