This Web 2.0 app is really useful for all of us doing research (doctoral student or not). Refseek gives you the choice of searching through its mass library of documents and web sites, retrieving a host of useful links pertaining to whatever subject you enter. My initial test run returned about 150,000 more hits than Google Scholar, although I haven't tested the relevancy of each returned link. I did, however, spot most of my own research references, which were not easy to compile without this cool little app. Give it a try! http://www.refseek.com/