1. Richardson, J., McKie, J., & Bariola, E. (2014). Multi attribute utility instruments and their use. In A. J. Culyer (Ed.), Encyclopedia of health economics (pp. 341–357). San Diego: Elsevier Science.
2. WHO. (2001). International classification of functioning, disability and health. Geneva: World Health Organization http://apps.who.int/classifications/icfbrowser/ Accessed 27 July 2013.
3. Fryback, D. G., Palta, M., Cherepanov, D., Bolt, D., & Kim, J. (2010). Comparison of 5 health related quality of life indexes using item response theory analysis. Medical Decision Making, 30(1), 5–15.
4. Hawthorne, G., Richardson, J., & Day, N. A. (2001). A comparison of the assessment of quality of life (AQoL) with four other generic utility instruments. Annals of Medicine, 33, 358–370.
5. Richardson, J., Khan, M. A., Iezzi, A., & Maxwell, A. (2014). Comparing and explaining differences in the content, sensitivity and magnitude of incremental utilities predicted by the EQ-5D, SF-6D, HUI 3, 15D, QWB and AQoL-8D multi attribute utility instruments’. Medical Decision Making,. doi: 10.1177/0272989X14543107 .