Karon S.L, Sainfort F., Zimmerman D.R.  1999.  Stability of nursing home quality indicators over time. Medical Care. 37(6):570-9.

Maxwell C.J, Zimmerman D., Karon S.L, Sainfort F., Purnell M.  1998.  Estimating quality indicators for chronic care from the MDS-2.0: risk-adjustment issues and concerns.. Canadian Journal of Quality in Health Care. 14(3):4-13.

Ramsay JD, Sainfort F., Zimmerman D..  1995.  An empirical test of the structure, process, and outcome quality paradigm using resident-based, nursing facility assessment data.. American Journal of Medical Quality. 10(2):63-75.

Zimmerman D.R, Karon S.L, Arling G., Clark B.R, Collins T., Ross R., Sainfort F..  1995.  Development and testing of nursing home quality indicators. Health Care Financ Rev. 16(4):107-27.