1. MAC (Museum Access Consortium).
http://www.cityaccessny.org/mac.php
. Accessed 28 Feb 2018
2. State Tactile Museum “Homer”, Ancona, Italy.
https://www.yamgu.com/en/place/6463/state-tactile-museum-homer-ancona/
. Accessed 28 Feb 2018
3. Kardoulias, T.: Guidelines for making tactile diagrams and accompanying narratives.
http://www.artbeyondsight.org/handbook/acs-tactileguidelines.shtml
. Accessed 28 Feb 2018
4. Guidelines and Standards for Tactile Graphics, The Braille Authority of North America (2010).
http://www.brailleauthority.org/tg/
. Accessed 28 Feb 2018
5. Levi, F., Rolli, R.: Disegnare per le mani. Manual of Tactile Graphics. Silvio Zamorani Editore, Torino (1994)