Gifford D.R, Lapane K.L, Gambassi G., Landi F., Mor V., Bernabei R..  1999.  Tacrine use in nursing homes: implications for prescribing new cholinesterase inhibitors. SAGE Study Group. Systematic Assessment of Geriatric Drug Use via Epidemiology.. Neurology. 52(2):238-44.

Gifford D.R, Lapane K.L, Gambassi G., Landi F., Mor V., Bernabei R..  1999.  Tacrine use in nursing homes: Implications for prescribing new cholinesterase inhibitors. Neurology. 52(2):238-244.