Sinn, h. (1998). The pay-as-you-go pension system as a fertility insurance and enforcement device. National Bureau of Economic Research.
Παραπομπή σε μορφή Chicago (17η εκδ.)Sinn, hans-Werner. The Pay-as-you-go Pension System as a Fertility Insurance and Enforcement Device. Cambridge: National Bureau of Economic Research, 1998.
Παραπομπή σε μορφή MLA (9th εκδ.)Sinn, hans-Werner. The Pay-as-you-go Pension System as a Fertility Insurance and Enforcement Device. National Bureau of Economic Research, 1998.
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