Sensitive CO and 13CO survey of water fountain stars - Detections towards IRAS 18460-0151 and IRAS 18596+0315J. R. Rizzo, J. F. Gómez, L. F. Miranda, M. Osorio, O. Suárez and M. C. Durán-RojasA&A, 560 (2013) A82DOI: https://doi.org/10.1051/0004-6361/201322187