Columbia subject headings:
Restraint of trade--European Union countries.
Restraint of trade--Switzerland.
Restraint of trade--United States.
Tie-ins (Marketing)--Law and legislation--European Union countries.
Tie-ins (Marketing)--Law and legislation--Switzerland.
Tie-ins (Marketing)--Law and legislation--United States.
Harvard subject headings:
Tie-ins (Marketing)--Law and legislation--European Union countries.
Tie-ins (Marketing)--Law and legislation--Switzerland.
Tie-ins (Marketing)--Law and legislation--United States.
Princeton subject headings: