Rescheduling a three shift system at a steel rolling mill : effects of a one hour delay of shift starting times on sleep and alertness in younger and older workers

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      <subfield code="c">Roger R. Rosa... [et al.]</subfield>
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      <subfield code="a">The objective is to evaluate a new work schedule at a Finnish steel mill with special attention to effects on older workers. The schedule was designed to improve sleep before the morning shift, and alertness during the morning shift, by delaying shift start and end times</subfield>
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      <subfield code="g">nº 10, October 1996 ; p. 677-685</subfield>
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