1. Shift work,1971
2. Retired Day work Shift work Nonparticipants Work status 1985/6
3. Shift work 1971 Regular day work,1971
4. Shift work and cardiovascular disease;Åkerstedt, T.; Knutsson, A.; Alfredsson, L.;Scand J Work Environ Health,1984
5. Schichtarbeit und ischämische herzkrankheit (Shift work;Wagner, U.;and ischemic heart disease; Arztl Fortbild (Jena),1989