The molecular and dusty composition of Betelgeuse's inner circumstellar environment G. Perrin, T. Verhoelst, S. T. Ridgway, J. Cami, Q. N. Nguyen, O. Chesneau, B. Lopez, Ch. Leinert and A. Richichi A&A, 474 2 (2007) 599-608 Published online: 04 September 2007 DOI: 10.1051/0004-6361:20077863