1. A history of Medicare Part C;McGuire;Milbank Q.,2011
2. Gold M Jacobson G D'Amico A Neuman T Medicare Advantage 2013 spotlight: enrollment market update http://kaiserfamilyfoundation.files.wordpress.com/2013/06/8448.pdf 2013
3. Centers for Medicare and Medicaid Services CMS fast facts http://www.cms.gov/Research-Statistics-Data-and-Systems/Statistics-Trends-and-Reports/CMS-Fast-Facts/index.html 2014
4. Risk differential between Medicare beneficiaries enrolled and not enrolled in an HMO;Eggers;Health Care Finance Rev.,1980
5. Pre-enrollment reimbursement patterns of Medicare beneficiaries enrolled in “at-risk” HMOs;Eggers;Health Care Finance Rev.,1982