Luy, Marc. “A Classification of the Nature of Mortality Data Underlying the Estimates for the 2004 and 2006 United Nations’ World Population Prospects”. Comparative Population Studies 35, no. 2 (February 10, 2011). Accessed March 28, 2024. https://www.comparativepopulationstudies.de/index.php/CPoS/article/view/30.