[19] Compassion in World Farming, op basis van de sociaaleconomische studie van de Commissie, zie "Alternatives to the barren battery cage for the housing of laying hens in the European Union", blz. 27.
[19] Compassion in World Farming on the basis of the Commission's socio-economic study, Vergleiche „Alternatives to the barren battery cage for the housing of laying hens in the European Union“, S. 27.