Chemical evolution in the early phases of massive star formation - II. DeuterationT. Gerner, Y. L. Shirley, H. Beuther, D. Semenov, H. Linz, T. Albertsson and Th. HenningA&A, 579 (2015) A80DOI: https://doi.org/10.1051/0004-6361/201423989