Circumstellar H I and CO around the carbon stars V1942 Sagittarii and V Coronae BorealisY. Libert, E. Gérard, C. Thum, J. M. Winters, L. D. Matthews and T. Le BertreA&A, 510 (2010) A14DOI: https://doi.org/10.1051/0004-6361/200913278
