Hughes C.M, Lapane K.L, Mor V., Ikegami N., Jonsson P.V, Ljunggren G., Sgadari A..  2000.  The impact of legislation on psychotropic drug use in nursing homes: a cross-national perspective. Journal of the American Geriatrics Society. 48(8):931-7.

Ribbe M.W, Ljunggren G., Steel K., Topinkova E., Hawes C., Ikegami N., Henrard J.C, Jonnson P.V.  1997.  Nursing homes in 10 nations: A comparison between countries and settings. Age & Ageing. 26(SUPPL. 2):3-12.