1. Airbus and German Aerospace Centre (DLR) Perform Research Tests for Fuel Cell Powered Autonomous Taxiing;Airbus International Press Release,2011
2. Fuel cell systems for aircraft application;Friedrich;ECS Transactions,2009
3. Boeing Successfully Flies Fuel Cell-Powered Airplane;Boeing news release,2008
4. DLR Motor Glider Antares Takes off in Hamburg-powered by a Fuel Cell;DLR National Press Release,2009
5. G. Romeo, F. Borello, G. Correa, ENFICA-FC: Design, Realization and Flight Test of all Electric 2-Seat Aircraft Powered by Fuel Cells, 27th International Congress of the Aeronautical Sciences (ICAS2010), 2010.