ADN versus BSN

Does anyone have any links to journals or articles on this topic? I am having trouble finding useful articles on the subject. I am writing a research paper on whether a BSN should be the minimal acceptable education to practice nursing. Of course I have an opinion on it but am having trouble finding articles and/or journals that support each side. This is a controversial topic in nursing so I am sure there is plenty written about it but all I am finding is message boards. Any help would be greatly appreciated.