1. Euro Health Consumer Index 2009;Björnberg,2009
2. Die Unfähigkeit zu trauern. Grundlagen kollektiven Verhaltens;Mitscherlich,1967
3. The German health care system.A concise overview;Obermann,2013
4. Pediatricians—victims of persecution 1933-1945;Seidler,2000
5. Cochrane on communism: the influence of ideology on the search of evidence;McKee;Inter J Epidemiol,2007