1. Bevan S McGee R Quadrello T 2009 Fit for Work? Musculoskeletal Disorders and the Irish Labour Market: The Work Foundation http://www.fitforworkeurope.eu/Downloads/Website-Documents/ffw_Ireland311009.pdf
2. Risk factors for work-related musculoskeletal disorders: A systematic review of recent longitudinal studies;Da Costa;Am J Ind Med,2010
3. Eurostat 2012 Economic Size Units. Available on http://epp.eurostat.ec.europa.eu/statistics_explained/index.php/Glossary:ESU
4. Musculoskeletal symptoms in Swedish dairy farmers;Gustafsson;Swedish J Agr Res,1994