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