1. Net::SinFP 0.92. http://search.cpan.org/~gomor/Net-SinFP-0.92/
2. Stateful Passive Fingerprinting for Malicious Packet Identification. http://www.andrew.cmu.edu/user/xsk/XenoKovahThesis.pdf
3. IPv6 Neighbor Discovery Protocol based OS Fingerprinting. http://hal.inria.fr/docs/00/16/99/90/PDF/technical_report_fingerprinting.pdf
4. A Hybrid Approach to Operating System Discovery using Answer Set Programming. http://ieeexplore.ieee.org/iel5/4258513/4258514/04258556.pdf?tp=&isnumber=&arnumber=4258556
5. Toward Undetected Operating System Fingerprinting. http://www.usenix.org/events/woot07/tech/full_papers/greenwald/greenwald.pdf