1. 3 M. (2017). Archwire products—Oral care orthodontic product catalog. 3 M.com/ortho. Accessed August 04, 2017
2. Aerofit. (2017). Couplings—Cryofit. http://aerofit.bluetonemedia.com/sma-cryofit-couplings . Accessed July 14, 2017
3. AZoM. (2002). Shape memory polymers—Biodegradable sutures. https://www.azom.com/article.aspx?ArticleID=1542 . Accessed August 03, 2017
4. Behl, M., & Lendlein, A. (2007). Shape-memory polymers. Materials today, 10(4), 20–28.
5. Brown J. (2015). Shape memory alloys: New ways of using heat for a technology advantage. www.appliancedesign.com . Accessed July 11, 2017