Herschel/PACS spectroscopy of trace gases of the stratosphere of TitanM. Rengel, H. Sagawa, P. Hartogh, E. Lellouch, H. Feuchtgruber, R. Moreno, C. Jarchow, R. Courtin, J. Cernicharo and L. M. LaraA&A, 561 (2014) A4DOI: https://doi.org/10.1051/0004-6361/201321945