Hartogh, P. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society; Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society;
Güsten, R., Schäfer, F., Stark, R., van der Wal, P., Graf, U., Schieder, R., et al. (2000). The next step: FIR heterodyne spectroscopy on board SOFIA. In ISO beyond the peaks: The 2nd ISO workshop on analytical spectroscopy, held 2-4 February 2000 at VILSPA. JPL, California Institute of Technology, Pasadena, CA, USA.