“On Demographic Changes, Retirement Age, Prolongation and Gradual Reduction of the Poles’ Economic Activity, and the Threat of Social Exclusion of the Elderly: An Interview With Professor Maciej Żukowski, the President of the Polish Social Insurance Association, and the Pro-Vice-Chancellor for Science and International Cooperation of the Poznań Economic University”. 2013. Journal of Public Governance 20 (2): 77-82. https://publicgovernance.pl/index.php/zpub/article/view/23508.