1. Achenbaum WA (1986) Social security: visions and revisions. New York
2. Achinger H (1939) Sozialpolitik und Fürsorge. Ein Abgrenzungsversuch, begründet aus den Ursachen der Notstände. Berlin
3. ACIR (Advisory Commission on Intergovernmental Relations) (1980a) Public assistance: the growth of a federal function. Washington
4. ACIR (Advisory Commission on Intergovernmental Relations) (1980b) State and local pension systems: federal regulatory issues. Report A-71. Washington
5. Adema W, Ladaique M (2005) Net social expenditure, 2005 edn. more comprehensive measures of social support. OECD Social, Employment and Migration Working Papers No. 29. Paris