Alternatives to national average income data as eligibility criteria for international subsidies: a social justice perspective. Shebaya S, Sutherland A, Levine O, Faden R. Dev World Bioeth. 2010 Dec;10(3):141-9. doi: 10.1111/j.1471-8847.2009.00270.x. PMID: 19961515
Health inequities: causes and potential solutions. Kissoon K, Larson C, Kissoon N. Aust N Z J Public Health. 2012 Dec;36(6):518-9. doi: 10.1111/j.1753-6405.2012.00952.x. PMID: 23216487
Health inequalities in modern societies and beyond. Introduction. Lahelma E, Rahkonen O. Soc Sci Med. 1997 Mar;44(6):721-2. doi: 10.1016/s0277-9536(97)88373-6. PMID: 9080557
The economics of inequality in health: a bibliography. Pereira J. Soc Sci Med. 1990;31(3):413-20. doi: 10.1016/0277-9536(90)90288-4. PMID: 2218621
Health and wealth in Europe. Hunter DJ, Richards T. BMJ. 2008 Jun 21;336(7658):1390. doi: 10.1136/bmj.a344. PMID: 18566049