1. National Endowment for the Arts. To Read or Not to Read: A Question of National Consequence. Research Report #47. November, 2007. 98 p.
2. http://www.eink.com/technology/howitworks.html.
3. http://www.polymervision.com/.
4. http://www.sonystyle.com/.
5. http://www.jinke.com.cn/Compagesql/English/index.asp.