Autism, PDD-NOS & Asperger's fact sheets | Did Einstein & Newton have Asperger's syndrome?. www.autism-help.org [online]. [cit. 2020-11-01]. Dostupné online.
books.google.com
KING, Henry C. The History of the Telescope [online]. [cit. 2009-11-06]. Dostupné online. (anglicky), str. 74