Constraining the thermal history of the warm-hot intergalactic mediumL. Zappacosta, R. Maiolino, A. Finoguenov, F. Mannucci, R. Gilli and A. FerraraA&A, 434 3 (2005) 801-809DOI: https://doi.org/10.1051/0004-6361:20040371