Carbon stars within the Gaia-ESO survey C. Abia, S. Van Eck, T. Masseron, T. Merle, C.C. Worley, T. Zwitter and the Gaia-ESO Survey Consortium EAS Publications Series, 67-68 (2014) 349 Published online: 17 July 2015 DOI: 10.1051/eas/1567061