Photospheric and stellar wind variability in ϵ Ori (B0 Ia) R. K. Prinja, Th. Rivinius, O. Stahl, A. Kaufer, B. H. Foing, J. Cami and S. Orlando A&A, 418 2 (2004) 727-736 Published online: 09 April 2004 DOI: 10.1051/0004-6361:20035638