http://www.ambysoft.com/agileDatabaseTechniques.html

http://www.martinfowler.com/articles.html

http://www.agiledata.org/

http://www.xprogramming.com/xpmag/index.htm

http://domaindrivendesign.org/index.html

http://www.c2.com/cgi/wiki?RefactoringWithRelationalDatabases