Search for CO gas in Pluto, Centaurs and Kuiper Belt objects at radio wavelengths D. Bockelée-Morvan, E. Lellouch, N. Biver, G. Paubert, J. Bauer, P. Colom and D. C. Lis A&A, 377 1 (2001) 343-353 Published online: 15 October 2001 DOI: 10.1051/0004-6361:20011040