The discovery of a shell-like event in the O-type star HD 120678 R. Gamen, J. I. Arias, R. H. Barbá, N. I. Morrell, N. R. Walborn, A. Sota, J. Maíz Apellániz and E. J. Alfaro A&A, 546 (2012) A92 Published online: 10 October 2012 DOI: 10.1051/0004-6361/201118725