scholar.google.com is a good place to start. It’s run by google, but the only results it gives you are peer-reviewed papers from reputable scholarly journals. After you poke around on there for a bit, talk to your school librarian. You may think librarians are out-dated, but most of them have extensive training with online media, etc. If your school doesn’t have a good librarian to talk to, go to a major public library, or the library at a local university.