μ (λάθος σύνδεσμο)
*[http://www.china-profile.com/data/ani_ceu_pop.htm# China, Europe, USA: Population by Age and Sex, 1950-2050]. Moving Age Pyramids.
*[http://www.census.gov/ipc/www/idbpyr.html U.S. Census Bureau, Population Pyramids for Countries of the World]
*[http://www.geocities.com/funnyguy_35/DefenceTraining.PDF Gunnar Heinsohn: Demography and War] (brief outline of Heinsohn's Youth Bulge Theory of social unrest)
*[http://www.geocities.com/funnyguy_35/HeinsohnPopulation.PDF Gunnar Heinsohn: Population, Conquest and Terror in the 21st Century] (Heinsohn applies his Youth Bulge Theory of social unrest to European imperialism as well as today's Islamist terror)
*[http://www.populationaction.org/resources/publications/securitydemographic/ The Security Demographic: Population and Civil Conflict after the Cold War]
*[http://www.zmag.org/Sustainers/Content/2003-03/14hendrixson.cfm The "Youth Bulge"] (zmag.org)