Evidence of magnetic field decay in massive main-sequence starsL. Fossati, F. R. N. Schneider, N. Castro, N. Langer, S. Simón-Díaz, A. Müller, A. de Koter, T. Morel, V. Petit, H. Sana and G. A. WadeA&A, 592 (2016) A84DOI: https://doi.org/10.1051/0004-6361/201628259