The CDC (yes, THAT CDC!) - Zombie Preparedness Courtesy of the U.S. Government
"The Zombies Among Us--Exploring the Resurgent Popularity of Zombies in Modern Culture" (Planetsave)
"Our Zombies, Ourselves: Why We Can't Get the Undead Off Our Brains" (Atlantic) - (Requires off-campus log-in)
"San Diego State Wants to Draw Students In With Zombies" (NPR) - (Course taught by Ms. St. John's sister-in-law!)
This is a topic that lends itself well to advanced searches on Google. Also, check out the "References" section of the Wikipedia article on Zombies.