@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((datum == null) ? 0 : datum.hashCode());
		result = prime * result + nummer;
		result = prime * result + plaatsen;
		result = prime * result + ((prijs == null) ? 0 : prijs.hashCode());
		result = prime * result + ((titel == null) ? 0 : titel.hashCode());
		result = prime * result
				+ ((uitvoerders == null) ? 0 : uitvoerders.hashCode());
		return result;
	}