References
- www.oica.net/wp-content/uploads/total-sales-2015.jpg.
- www.statista.com/statistics/271608/global-vehicle-sales-of-automobile-manufacturers.
- www.ev-volumes.com/country/total-world-plug-in-vehicle-volumes.
- www.laser-community.com/en/e-mobility-laser-welds-batteries-electric-buses.
- en.wikipedia.org/wiki/Battery_electric_bus.
- www.optech-consulting.com/html/press_release_-_17thmarch_2016.html.
- http://investor.ipgphotonics.com/-/media/Files/I/Ipg-Photonics-IR/reports-and-presentations/ipg-2016-investor-day-presentation.pdf
- 김남성, Photonics Conference 2016 - 광섬유레이저특별세션 I, 고출력광섬유레이저시장에코시스템의최신동향.