[4] "The Prevalence of Dementia in Europe: A Collaborative Study of 1980 - 1990 Findings", International Journal of Epidemiology, 20, 1991, A. Hoffman et al.
[4] The Prevalence of Dementia in Europe: A Collaborative Study of 1980 - 1990 Findings, International Journal of Epidemiology, 20, 1991, A. Hoffman et al.