Magnetic activity and differential rotation in the very young star KIC 8429280A. Frasca, H.-E. Fröhlich, A. Bonanno, G. Catanzaro, K. Biazzo and J. Molenda-ŻakowiczA&A, 532 (2011) A81DOI: https://doi.org/10.1051/0004-6361/201116980