Detection of an asymmetry in the envelope of the carbon Mira R Fornacis using VLTI/MIDI C. Paladini, S. Sacuto, D. Klotz, K. Ohnaka, M. Wittkowski, W. Nowotny, A. Jorissen and J. Hron A&A, 544 (2012) L5 Published online: 31 July 2012 DOI: 10.1051/0004-6361/201219831