Forster D , Józan P.Health in Eastern Europe . Lancet1990: 335: 458–60.
2.
Mattiasson I et al. Threat of unemployment and cardiovascular risk factors: longitudinal study of quality of sleep and serum cholesterol concentrations in men threatened with redundancy . BMJ1990: 301: 461–6.
3.
Morris J , Derek GC , Shaper AG.Loss of employment and mortality . BMJ1994: 308: 1135–9.
4.
Williams R , Barefoot JC , Califf RM et al: Prognostic importance of social and economic resources among medically treated patients with angiografically documented coronary artery disease . JAMA1992:267: 520–4.