[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] Zie bv. UN (2000), Replacement Migration: Is it a Solution to Declining and Ageing Populations? Population Division, Department of Economics and Social Affairs, New York.