The University of Luxembourg’s CVCE.eu website (former Centre Virtuel de la Connaissance sur l'Europe) gives you access to documents and publications on the European integration process.
It is a major information source available in English, French and German. Select your language preference in the top left sidebar.

The CVCE.eu website contains a chronological presentation of the milestones of European integration from 1945 to 2014. The available
resources contain a rich range of digitalised historical documents.

Paul P. Craig. In: Oxford Principles of European Union Law, Vol. II, The Internal Market, 2021.

The first part of this chapter is concerned with negative integration and the four freedoms. The focus in the second part of the chapter switches to positive integration and harmonization. The final part of the chapter considers the tension between the economic and the social in the internal market.

Francesco Nicoli. In: Amsterdam Centre for European Studies Research Paper ; 2019, No. 05.

This paper provides a coherent understanding of the path-dependent, economic logic of European integration from the Common Market to today’s challenges, with a specific focus on periods of crisis.

In: Revue du droit de l'Union européenne, 2012, n. 4, page 601-614

Riccardo Perissich. In: European Business Journal, 1993, vol.5, no.1, page 8

January 1, 1993, marked neither the beginning nor the end of efforts to construct a single market ...

Michael Calingaert. In: National Planning Association (Washington, D.C.) , 1990.

The implementation of the internal market discussed from a US American perspective.