VanBergeijk, Ernst (1. oktober 2010). «Daniel Tammet: Born on a Blue Day: Inside the Extraordinary Mind of an Autistic Savant». Journal of Autism and Developmental Disorders. 10 (på engelsk). 40: 1293–1293. ISSN1573-3432. doi:10.1007/s10803-009-0868-3. Besøkt 28. januar 2023. «After his record breaking recitation of Pi he appeared upon Late Night with David Letterman and even a talk show in Iceland where he spoke Icelandic for the entire show- a language that he only learned four days before the taping of the show.»
science.org
«The Man Who Memorized Pi». www.science.org (på engelsk). 14. april 2005. Besøkt 28. januar 2023. «When Daniel Tammet set the European record for pi memorization last year, memorizing 22,514 digits in just over 5 hours, he attributed the feat to his ability to see numbers as complex, 3-dimensional landscapes, complete with color, texture, and sometimes even sound.»
VanBergeijk, Ernst (1. oktober 2010). «Daniel Tammet: Born on a Blue Day: Inside the Extraordinary Mind of an Autistic Savant». Journal of Autism and Developmental Disorders. 10 (på engelsk). 40: 1293–1293. ISSN1573-3432. doi:10.1007/s10803-009-0868-3. Besøkt 28. januar 2023. «After his record breaking recitation of Pi he appeared upon Late Night with David Letterman and even a talk show in Iceland where he spoke Icelandic for the entire show- a language that he only learned four days before the taping of the show.»