To find scanned electronic versions of law review articles, try HeinOnline.
Example: Your article cites: Erwin Chemerinsky, Against Sovereign Immunity, 53 Stan. L. Rev. 1201 (2001).
You can also try Melvyl to look for journals that don't show up in Google Scholar or Library Search.
Ask a law librarian about law review articles, journals, newspaper articles, or other periodical materials that you can't find.
Databases are ok to cite for news sources.
The internet is ok to cite for news sources.
Pat Lee, Front-page News Item, Newspaper, Jan. 1, 2000, at A1.
Pat Lee, Front-page News Item, Newspaper, (Jan. 1, 2000), http://url.com.