The Herschel/HIFI spectral survey of OMC-2 FIR 4 (CHESS) - An overview of the 480 to 1902 GHz rangeM. Kama, A. López-Sepulcre, C. Dominik, C. Ceccarelli, A. Fuente, E. Caux, R. Higgins, A. G. G. M. Tielens and T. Alonso-AlbiA&A, 556 (2013) A57DOI: https://doi.org/10.1051/0004-6361/201219431