http://sqlserverpedia.com/blog/sql-server-bloggers/update-statistics-before-or-after-an-index-rebuild/

http://www.sqlskills.com/blogs/paul/post/Search-Engine-QA-10-Rebuilding-Indexes-and-Updating-Statistics.aspx

Another good article. http://ola.hallengren.com/sql-server-index-and-statistics-maintenance.html