A combined HST and XMM-Newton campaign for the magnetic O9.7 V star HD 54879 - Constraining the weak-wind problem of massive starsT. Shenar, L. M. Oskinova, S. P. Järvinen, P. Luckas, R. Hainich, H. Todt, S. Hubrig, A. A. C. Sander, I. Ilyin and W.-R. HamannA&A, 606 (2017) A91DOI: https://doi.org/10.1051/0004-6361/201731291
