MEIER, Sonja, Unjustified Enrichment, in BASEDOW, Jürgen, HOPT, Klaus J., e ZIMMERMANN, Reinhard (orgs.), The Max Planck Encyclopedia of European Private Law, vol. 2, London, Oxford University, 2012, pp. 1742-1747.
Clique no link 12. UnjustifiedEnrichmetMPI.pdf para ver o arquivo.