Spectroscopic characterization of the atmospheres of potentially habitable planets: GL 581 d as a model case studyP. von Paris, J. Cabrera, M. Godolt, J. L. Grenfell, P. Hedelt, H. Rauer, F. Schreier and B. StrackeA&A, 534 (2011) A26DOI: https://doi.org/10.1051/0004-6361/201117091