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;
Csengeri, T., Menten, K. M., Wyrowski, F., Requena-Torres, M. A., Güsten, R., Wiesemeyer, H., et al. (2012). SOFIA observations of far-infrared hydroxyl emission toward classical ultracompact HII/OH maser regions. Astronomy and Astrophysics, 542: L8. doi:10.1051/0004-6361/201218933.