1. Blue Cross and Blue Shield Companies Give Their Distinctive Mark to Quality, Efficient Hospitals Chicago (2013)
2. Blue Cross and Blue Shield of Illinois Drug Formulary Chicago (2013)
3. Brekke, K., Koenigbauer, I., Straume, O.: Reference pricing of pharmaceuticals. J. Health Econ. 26(3), 613–642 (2007)
4. Bundesministerium für Gesundheit: Pressemitteilung— Überprüfung des Preismoratoriums und der gesetzlichen Herstellerabschläge für Arzneimittel, Berlin (2012)
5. Burns, L., Lee, J.: Hospital purchasing alliances: utilization, services, and performance. Health Care Manag. Rev. 33(3), 203–215 (2008)