1. Lowering cholesterol concentrations and mortality: a quantitative review of primary prevention trials;Muldoon, M.F.; Manuck, S.B.; Matthews, K.A.;BMJ,1990
2. Low serum cholesterol concentration and short term mortality from injuries in men and women;Lindberg, G.; RAstam, L.; Gullberg, B.; Eklund, G.A.;BMJ,1992
3. Suicide and attempted suicide;Stengel, E.,1970
4. Diagnostic and statistical manual of mental disorders, third edition;Association, American Psychiatric,1987
5. Helplessness: on depression, development and death;Seligman, M.E.P.,1975