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European Commission : Directorate-General for Economic and Financial Affairs., Giuseppe Carone, Declan Costello, Diez N. Guardia, Gilles Mourre, Bartosz Przywara, and Aino Salomaki. The Economic Impact of Ageing Populations in the EU25 Member States. Brussels- Belgium: European Comission: Directorate-General for Economic and Financial Affairs, 2005.

European Commission : Directorate-General for Economic and Financial Affairs., et al. The Economic Impact of Ageing Populations in the EU25 Member States. Brussels- Belgium: European Comission: Directorate-General for Economic and Financial Affairs, 2005.