www.socsci.mcmaster.ca/polisci/emplibrary/Harmonization%20of%20Private%20Law%20Do%20We%20Need%20It.pdf
This is a comprehensive review of harmonisation and Article 95 of the EC Treaty.

www.ejcl.org/75/art75-6.html
This article, provided by the Electronic Journal of Comparative Law, deals with the future of European civil procedure. It also specifically deals with harmonisation of civil procedures in the EU.

europa.eu/legislation_summaries/institutional_affairs/treaties/amsterdam_treaty/a15000_en.htm
This is a comprehensive guide to the Amsterdam Treaty, provided on the Europa website, which also deals with the changes the Treaty introduces to the rules of approximation.

www.essex.ac.uk/ECPR/events/jointsessions/paperarchive/grenoble/ws20/schmidt.pdf
A link to an article by Susanne Schmidt about the principle of mutual recognition. Mutual recognition requires any Member State to admit into its territory goods or services which are marketed lawfully in the originating Member State.