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.

Mor V., Intrator O., Fries B.E, Phillips C., Teno J., Hiris J., Hawes C., Morris J..  1997.  Changes in hospitalization associated with introducing the Resident Assessment Instrument.. Journal of the American Geriatrics Society. 45(8):1002-10.