Consumption and efficiency of a passenger car with a Hydrogen/Oxygen PEFC based hybrid electric drivetrain
F.N. Büchi, G. Paganelli, P. Dietrich, D. Laurent, A. Tsukada, P. Varenne, A. Delfino, R. Kötz, S.A. Freunberger, P.-A. Magne, D. Walser, D. Olsommer, Fuel Cells 7 (2007) 329–335.

On the efficiency of an advanced automotive fuel cell system
F.N. Büchi, S.A. Freunberger, M. Reum, G. Paganelli, A. Tsukada, P. Dietrich, A. Delfino, Fuel Cells 7 (2007) 159–164.

Modular stack-internal air humidification concept-verification in a 1kW stack
M. Santis, D. Schmid, M. Ruge, S.A. Freunberger, F.N. Büchi, Fuel Cells 4 (2004) 214–218.