Columbia subject headings:
Democracy--Mathematical models.
Political parties--Netherlands--Platforms--Mathematical models.
Political parties--Platforms--Mathematical models.
Voting--Mathematical models.
Voting--Netherlands--Mathematical models.
Harvard subject headings:
Democracy--Mathematical models.
Political parties--Netherlands--Platforms--Mathematical models.
Political parties--Platforms--Mathematical models.
Voting--Mathematical models.
Voting--Netherlands--Mathematical models.
Princeton subject headings: