Polarimetric observations of comet 67P/Churyumov-Gerasimenko during its 2008–2009 apparitionE. Hadamcik, A. K. Sen, A. C. Levasseur-Regourd, R. Gupta and J. LasueA&A, 517 (2010) A86DOI: https://doi.org/10.1051/0004-6361/201014167