[45] Si veda, per esempio, ONU (2000), Replacement Migration: Is it a Solution to Declining and Ageing Populations?, Divisione demografica, Dipartimento per gli affari economici e sociali, New York.
[45] Siehe beispielsweise: UN (2000), Replacement Migration: Is it a Solution to Declining and Ageing Populations?, Population Division, Department of Economics and Social Affairs, New York.