References
- http://www.precisionmicrodrives.com
- http://ivanpoupyrev.com
- http://www.sonycsl.co.jp
- http://www.motoroal.com
- http://www.engadget.com
- http://www.vivitouvh.com
- http://www.apple.com
- http://www.pacinian.com
- http://www.disneyresearch.com/project/teslatouch/
- http://www.senseg.com