3Robert Haveman, Barbara Wolfe. "The Economics of Disability and Disability Policy". A. J. Culyer & J. P. Newhouse (ed.). Handbook of Health Economics, chapter 18, 2000.
4David H. Dean, Robert C. Dolan. "'Assessing the Role of Vocational Rehabilitation in Disability Policy". Journal of Policy Analysis and Management. 1991, (10) : 568 - 587.
5James O' Brien, lan Dempsey. " Comparative Analysis of Employment Services for People with Disabilities in Australia, Finland, and Sweden". Journat of Policy and Practice in Intellectual Disabilities. 2004, (1): 126- 135.