Morris J.N, Berg K., Fries B.E, Steel K., Howard E.P.  2013.  Scaling functional status within the interRAI suite of assessment instruments. BMC Geriatr. 13:128.

Morris J.N, Fries B.E, Frijters D., Hirdes J.P, Steel R.K.  2013.  interRAI home care quality indicators. BMC Geriatr. 13:127.