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http://research.spa.aalto.fi/publications/theses/lemmetty_mst/thesis.pdf
2. Afb.org.: Refreshable Braille Display - American Foundation for the Blind (2018).
http://www.afb.org/info/refreshable-braille-display-3652/5
. Accessed 10 May 2018
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. Accessed 13 May 2018
4. W3.org.: World Wide Web Consortium (W3C) (2018).
http://www.w3.org/
. Accessed 13 May 2018
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http://www.w3.org/WAI/
. Accessed 13 May 2018