This article by John Furlong is an updated and revised version of an article originally authored by John Furlong and Susan Doe and published in Legal Information Management 2006, 6(2) Summer 2006 and covers in some detail the basic sources for researching European Union law. It also gives some background on the growth of the European Union and its law making.

This article by Stig Marthinsen describes the background to the establishment of the Caselex database and outlines how it is being currently developed and the plans for its future.

Phil Wilkin runs the Archive of European Integration (AEI), University Library System, University of Pittsburgh, an online repository and archive for research materials on the topic of European integration. The AEI uploads both privately-produced papers and official European Union (EU) documents, which are freely available to all. Because the EU is a treaty- and law-driven organisation, a small percentage of the privately-produced papers and many of the official EU documents on the AEI are relevant to EU law, primarily in the areas of the implementation of EU law in policy and administrative areas and the work of the court system.