1. Short and long sleep and sleeping pills: Is increased mortality associated?;Kripke;Arch Gen Psychiatry,1979
2. Mortality risk associated with sleeping patterns among adults;Wingard;Sleep,1983
3. Sleep disorders in relation to coronary heart disease;Partinen;Acta Med Scand,1982
4. Poor sleep quality, emotional stress and morbidity: a six year follow-up study of 10778 persons aged 35–59 years;Koskenvou,1986
5. Are sleep complaints predictive of future myocardial infarction?;Appels;Act Nerv Super,1987