Güsten, R. Max Planck Institute for Radio Astronomy, Max Planck Society;
Harju, J., Daniel, F., Sipilä, O., Caselli, P., Pineda, J., Friesen, R., et al. (2017). Deuteration of ammonia in the starless core Ophiuchus/H-MM1. Astronomy and Astrophysics, 600: A61, pp. A61. doi:10.1051/0004-6361/201628463.