1. Alexander D., et al., 2014. Electric Vehicle Batteries, Navigant Research, 1st Q 2014.
2. Deutche Bank Auto Team, 2010. Battery prices coming down fast, integrated oil, the end of the oil age, Dec. 2010
3. Batteries for electric cars – challenges, opportunities and outlook to 2020;Dinger;The Boston Consulting Group,2010
4. DNV GL, 2014. Alternative Fuel For Shipping, Strategic Research & Innovation, Position Paper.
5. E-Ferry Project: Final Design Specification, SØBY – FYNSHAV Sept. 2015.