Sommer, P. (2009) “Meetings Between Experts: a route to simpler fairer trials”,  Digital Investigation in press diin.2008.11.002

Sommer, P. (2006) "Two Computer Misuse Prosecutions",  Computers and Law,   16  (5),

Sommer, P. (2006) "Criminalising Hacking Tools", Digital Investigation, 3 (2), pp. 68-72

Sommer, P. (2005 and 2009) "Digital Evidence: A Guide for Directors and Corporate Advisors" Information Assurance Advisory Council Swindon, UK.

Sommer, P. (2004) "The Challenges of Large Computer Evidence Cases", Digital Investigation, 1 (1), pp. 16-17

Sommer, P. (2004) "Cybercrime" in Fraud: Law, Procedure and Practice, (Thackeray, S. ed.) Lexis-Nexis/Butterworths, London.

Sommer, P. (2004) "Computer Aids" in Fraud: Law, Procedure and Practice, (Thackeray, S. ed.) Lexis-Nexis/Butterworths, London.

Sommer, P. (2004) "The Future for the Policing of Cybercrime", Computer Fraud and Security Bulletin, 2004 (1), pp. 8-12

Sommer, P. (2003) "Evidence in Internet Paedophilia Cases: A Case for the Defence" in Policing Paedophiles on the Internet, (McVean, A. and P. Spindler eds) New Police Bookshop.

Sommer, P., A. Yasinsac, R. F. Erbacher and et al. (2003) "Computer Forensics Education", IEEE Security and Privacy, 1 (4), pp. 15-23

Sommer, P. (2002) "Evidence in Internet Paedophilia Cases", Computer and Telecommunications Law Review, 8 (7), pp. 176-184

Sommer, P. (1999) Cybercrime: Risk and Response, International Chamber of Commerce (ICC), Paris.

Sommer, P. (1999) "Intrusion Detection Systems as Evidence", Computer Networks, 31 (23-24), pp. 2477-2487