Unger, Rainer, and Alexander Schulze. “Can We Really (All) Work Longer? Trends in Healthy Life Expectancy According to Social Stratum in Germany”. Comparative Population Studies 38, no. 3 (January 31, 2013). Accessed March 28, 2024. https://comparativepopulationstudies.de/index.php/CPoS/article/view/101.