Ebbinghaus, Bernhard, and Dirk Hofäcker. “Reversing Early Retirement in Advanced Welfare Economies: A Paradigm Shift to Overcome Push and Pull Factors”. Comparative Population Studies 38, no. 4 (December 31, 2013). Accessed April 25, 2024. https://www.comparativepopulationstudies.de/index.php/CPoS/article/view/138.