1. Case-based reasoning: Foundational issues, methodological variations, and system approaches;Aamodt;AI Communications,1994
2. Understanding PKI: Concepts, standards, and deployment considerations;Adams,2002
3. Allman, E., Callas, J., Delany, M., Libbey, M., Fenton, J., & Thomas, M. (2007). DomainKeys identified mail (DKIM) signatures. .
4. Androutsopoulos, I., Koustias, J., Chandrinos, K. V., Paliouras, G., & Spyropoulos, C. (2000). An evaluation of Naïve Bayesian anti-spam filtering. In Proceedings of the workshop on machine learning in the new information age, 11th European conference on machine learning, Barcelona, Spain (pp. 9–17).
5. Androutsopoulos, I., Metsis, V., & Paliouras, G. (2006). Spam filtering with Naïve Bayes – which Naïve Bayes? In Proceedings of the third conference on email and anti-spam. Mountain View, California.