Columbia subject headings:
Common law.
Conflict of laws--Unjust enrichment.
Restitution--Germany.
Restitution.
Unjust enrichment--Germany.
Unjust enrichment.
Harvard subject headings:
Banking law--Germany.
Banking law.
Payment--Germany.
Payment.
Unjust enrichment--Germany.
Unjust enrichment.
Princeton subject headings: