HeinOnline is a great place to start looking for legal scholarship. Articles Plus will search HeinOnline, but in general, it's a good resource to familiarize yourself with.
Law Journal Library One Box Citation Widget
HeinOnline is the best source for U.S. law review articles. It also includes an index to law journal articles published in other countries. Nexis Uni also includes articles from most U.S. law reviews.
Treatises provide in-depth commentary and analysis of specific legal subjects. The D'Angelo Law Library's Treatise Finder provides a list of leading treatises for each specific legal subject, although note that most titles are available only in print or via Lexis or Westlaw.