The extrasolar planet Gliese 581d: a potentially habitable planet?P. von Paris, S. Gebauer, M. Godolt, J. L. Grenfell, P. Hedelt, D. Kitzmann, A. B. C. Patzer, H. Rauer and B. StrackeA&A, 522 (2010) A23DOI: https://doi.org/10.1051/0004-6361/201015329