Social Security Organization. (2020). Selected statistics of 2019[yearbook]. Tehran: Statistics and Accounting of Social and Economic Office. https://www.tamin.ir.
 Gunadi, W., Priska, V., Novianti, K., & Tmara, D. (2021). TREND ANALYSIS OF PENSION FUNDS IN INDONESIA FOR PERIOD 2012-2016. PalArch's Journal of Archaeol2017ogy of Egypt/Egyptology, 18(1), 608-619.
 Talebipour, Shima. (2016). Review of the law determining the duties of persons who have paid insurance premiums for ten years or less from the perspective of the principles and rules governing social security rights. Social Security Quarterly, 13 (5), 101-120.
CC BY 3.0 IGO.
 Jasmin, A.F., & Abdur Rahman, A. (2021). Does Elderly Employment Reduce Job Opportunities for Youth?. Research and Policy Brief;No. 48. World Bank, Malaysia. © World Bank. https://openknowledge.worldbank.org/handle/10986/36170 License
 Karimian, Z., Cheraghali, M., Dehghani, A.(2021). Studying and Analyzing Influential Demographic Variables on Support Ratio in Iranian Social Security Pension Fund Using System Dynamics. Journal of Industrial Management, 16(56), 123-138.
 Walwei, U., & Deller, J. (2021). Labor market participation of older workers in international comparison (No. 16/2021). IAB-Discussion Paper.
 Sterman, J. D. (2000). Business dynamics, system thinking and modeling for a complex world. Irwin, McGraw-Hill.
 Axel, B. Ã. (2003). What are NDC Pension Systems? What Do They Bring to Reform Strategies? (No. 03042). Munich Center for the Economics of Aging (MEA) at the Max Planck Institute for Social Law and Social Policy.
 Holzmann, R. (2019). The ABCs of NDCs (pp. 189-211). World Bank.
 Da Costa Morais, G., Novo, C. C., & Méxas, M. P. (2021). Notional Defined Contribution (NDC) Schemes: a pension system alternative. Revista Mexicana de Economía y Finanzas Nueva Época REMEF, 16(2), 524.
 Guardiancich, I., Weaver, R.K. , Demarco ,G., Dorfman. M.C. (2019). The politics of NDC pension scheme diffusion: constraints and drivers. Washington, DC: World Bank. https://doi.org/10.1596/31628
 Alonso-García, J., & Rosado-Cebrian, B. (2021). Financial crisis and pension reform in Spain: The effect of labour market dynamics. Journal of Economic Policy Reform, 24(2), 201-218.
 Alonso-García, J., & Devolder, P. (2019). Continuous time model for notional defined contribution pension schemes: Liquidity and solvency. Insurance: Mathematics and Economics, 88, 57-76.
 Medaiskis, T., & Eirošius, Š. (2019). A Comparison of Lithuanian and Swedish old age pension systems. Ekonomika, 98, 38-59.
 Kuitto, K., & Helmdag, J. (2021). Extending working lives: How policies shape retirement and labour market participation of older workers. Social Policy & Administration, 55(3), 423-439.
 Karimi, Maryam.(2019). The effect of early retirement (taieen taklif’s law) on the financial stability of the Social Security Organization, Persian Electronic Theses Database, http://repository.alzahra.ac.ir:8080/handle/Hannan/21647.
 Adabi Firoozjaei, Karimi, & Behnam. (2019). Pathology of the Armed Forces Pension Fund; Provide a system of personal accounts in order to ensure the financial stability of the fund. Defense Economics Quarterly, 3 (9), 59-84.
 Safari, Mohammad (2019). Investigating the Sustainability of Combined Private Retirement Plans Using a Combined Approach to Fuzzy Cognitive Mapping and System Dynamics. Insurance Research Journal, 3 (131), 81-104.
 Verejan, O., Bradu, M., Hirbu, E., Tacu, M., Verejan, V. (2018). Indicators of analysis and monitoring: A Public pension system. International Journal of Advances in Management, Economics and Entrepreneurship. 05(04), 117-144.
 Allianz, (2016), Pension Sustainability Index , Allianz International Pension Papers 1/2016, Allianz SE, Munich, Germany.
 Heydarpour, V., Zandieh, M., Farsijani, H., Rabieh, M. Providing a model for predicting container terminal performance in ports with system dynamics approach, Modern Research in Decision Making, 2, 2017, 109-132.
Ayatollahi, A., kazazi, A., Hanafizadeh, P., Khatami Firouzabadi, M. (2019). Structuring Of complex problem with coercive stakeholders using Post Modern Operational Research. Modern Research in Decision Making, 4(3), 75-95.
 Safaie, N., Cheraghalipour, A., roghanian, E. (2021). Investigating macro management attitudes in citrus production of Iran using a system dynamic modeling approach under R&D interventions and sustainability aspects. Management Research in Iran, 23(4), 55-79.
 Miri, N., Maddah, M., Raghfar, H. (2019). Aging and economic growth. Iranian aging. Journal of