Wodchis W.P, Hirth R.A, Fries B.E.  2007.  Effect of Medicaid payment on rehabilitation care for nursing home residents. Health Care Financ Rev. 28(3):117-29.

Carpenter G.I, Ikegami N., Ljunggren G., Carrillo E., Fries B.E.  1997.  RUG-III and resource allocation: comparing the relationship of direct care time with patient characteristics in five countries. Age & Ageing. 26(Suppl 2):61-5.

Ahronheim J.C, Mulvihill M., Sieger C., Park P., Fries B.E.  2001.  State practice variations in the use of tube feeding for nursing home residents with severe cognitive impairment.. Journal of the American Geriatrics Society. 49(2):148-52.