[DDD2003] Addison Wesley. August 20, 2003. Domain-Driven Design: Tackling Complexity in the Heart of Software. 0-321-12521-5. http://domaindrivendesign.org/books/ .

[PEAA2003] Pearson Education. January 2003. Patterns of Enterprise Application Architecture. 0321127420. http://martinfowler.com/books.html .