The different origins of magnetic fields and activity in the Hertzsprung gap stars, OU Andromedae and 31 ComaeA. Borisova, M. Aurière, P. Petit, R. Konstantinova-Antova, C. Charbonnel and N. A. DrakeA&A, 591 (2016) A57DOI: https://doi.org/10.1051/0004-6361/201526726
