1. Comparing standing posture and use of a sit-stand stool: analysis of vascular, muscular and discomfort outcomes during simulated industrial work;Antle;Int. J. Ind. Ergon.,2015
2. Psychophysical scaling with applications in physical work and the perception of exertion;Borg;Scand. J. Work Environ. Health,1990
3. Disabling injuries to childcare workers in Minnesota, 1985-1990: an analysis of potential risk factors;Brown;J. Occup. Med.,1993
4. Bureau of Workers' Compensation O, 2012, March 12, Division of safety & hygiene – lifting guidelines. Retrieved July 2014, from Ohio Bureau of Workers' Compensation: https://www.bwc.ohio.gov/employer/programs/safety/liftguide/liftguide.asp.
5. Staff Health in Early Childhood Education Programs;California Childcare Health Program,2006