G. Bangga, T. Lutz, and E. Krämer. 7th Conference on Science of Making Torque from Wind (TORQUE, 1037, page 022025. Bristol, IOP Publishing Ltd, (2018)
N. Sørensen, F. Bertagnolio, E. Jost, and T. Lutz. The Science of Making Torque from Wind (TORQUE 2018), 1037, 2, page 022003. Bristol, IOP Publishing, (2018)