1. 1) http://www.sony.co.jp/SonyInfo/News/Press/200705/07-053/
2. 2) http://www.i-micronews.com/reports/Printed-Electronics-vs-Hype/212/search?searchfield=printed+electronics
3. 3) http://www.m-kagaku.co.jp/aboutmcc/RC/special/feature1.html
4. 4) http://www.konicaminolta.jp/about/release/2010/0412_01_01.html