1. First steps towards a model of tactile graphicacy
2. Accuracy of tactual discrimination of letters, numerals, and geometric forms.
3. Temenoujka Bandrova . 2001 . Designing of Symbol System for 3D City Maps . In International Cartographic Conference ( Beijing, China), Vol. 2. International Cartographic Association, 1002–1010. Temenoujka Bandrova. 2001. Designing of Symbol System for 3D City Maps. In International Cartographic Conference (Beijing, China), Vol. 2. International Cartographic Association, 1002–1010.
4. Uncovering information needs for independent spatial learning for users who are visually impaired
5. John L. Barth . 1988. The Tactile Graphics Guidebook . American Printing House for the Blind, Louisville, KY, USA. http://www.archive.org/details/tactilegraphicsg00john John L. Barth. 1988. The Tactile Graphics Guidebook. American Printing House for the Blind, Louisville, KY, USA. http://www.archive.org/details/tactilegraphicsg00john