Barker, R.N., Kendall, M.D., Amsters, D.I., Pershouse, K.J., Haines, T.P., and Kuipers, P. (2009) The relationship between quality of life and disability across the lifespan for people with spinal cord injury. Spinal Cord, 47 (2). pp. 149-155.

Barker, Ruth N., Amsters, Delena I., Kendall, Melissa D., Pershouse, Kiley J., and Haines, Terry P. (2007) Reliability of the clinical outcome variables scale when administered via telephone to assess mobility in people with spinal cord injury. Archives of Physical Medicine and Rehabilitation, 88 (5). pp. 632-637.