Forskning
Visual impairment in adult people with moderate, severe, and profound intellectual disability
Warburg M. - 2008
https://onlinelibrary.wiley.com/doi/full/10.1034/j.1600-0420.2001.790504.x
Prevalence of visual impairment in adults with intellectual disabilities in the Netherlands: Cross-sectional study
Van Splunder J. - 2006