1. Sun, B. (2015). Smart Materials and Structures. 1st ed., Cape Town: Cape Peninsula Univerisity of Technology, pp: 2.
2. Bamfield, P. (2001). Chromic Phenomena The Technological Applications of Colour Chemistry. 1st ed., Cambridge: The Royal Society of Chemistry, pp: 7.
3. Kulčar, R., Friškovec, M., Gunde, MK., et al. (2009), Colorimetric properties of UV-thermochromic inks. In: 13th International Conference on printing, design and graphic communications Blaž Baromić, Senj, Croatia, 30 September–2 October 2009, pp: 89-93.
4. Kulčar, R., Friškovec, M., Knešaurek, N., et al. (2009), Colour changes of UV-curable thermochromic inks., Proceedings of the 36th International Research Conference of iarigai ‘Advanced in Printing and Media Technology’, Stockholm, Sweden, 13-16 September 2009, pp: 429-434.
5. ISO 7211-5:1984. Textiles: Woven fabrics - Construction - Methods of analysis Determination of linear density of yarn removed from fabric.