It's not as easy to use as Google Scholar, but Microsoft's Academic Search is a useful tool. It takes a more visual approach to showing where the article has been cited, so other related work can be easily identified on one page. Just remember that both Google Scholar and Academic Search only show a fraction of what is published in learned journals. Searching fee-based databases are the only way to go to make sure that you've covered all of your bases, and uncovered that vital journal paper! We can help you, as we have access to hundreds of academic research databases, so contact us now if you need help.