Basedow, Jürgen MPI for Comparative and International Private Law, Max Planck Society;
https://max-eup2012.mpipriv.de/index.php/Legislative_Competence_of_the_EU (beliebiger Volltext)
Basedow, J. (2012). Legislative Competence of the EU. In J. Basedow, K. J. Hopt, & R. Zimmermann (Eds.), The Max Planck Encyclopedia of European Private Law (pp. 1081-1084). Oxford: Oxford University Press.