Clouds in the atmospheres of extrasolar planets - II. Thermal emission spectra of Earth-like planets influenced by low and high-level cloudsD. Kitzmann, A. B. C. Patzer, P. von Paris, M. Godolt and H. RauerA&A, 531 (2011) A62DOI: https://doi.org/10.1051/0004-6361/201014343