1. The cost of occupational accidents and diseases;Andreoni,1986
2. Staff use of time and company productivity;Kupi;Nordisk Ergonomi,1993
3. Increasing Productivity and Profit through Health and Safety: The Financial Returns from a Safe Working Environment;Oxenburgh,2004
4. Increasing Productivity and Profit through Health and Safety;Oxenburgh,1991
5. ProductAbility (2004). Software for the Productivity Assessment Tool (full version) (Copyright; Oxenburgh, M. and Matchbox Software Ltd., UK). See www.productAbility.co.uk or e-mail maurice_oxenburgh@compuserve.com.