Heavy water stratification in a low-mass protostar A. Coutens, C. Vastel, S. Cazaux, S. Bottinelli, E. Caux, C. Ceccarelli, K. Demyk, V. Taquet and V. Wakelam A&A, 553 (2013) A75 Published online: 07 May 2013 DOI: 10.1051/0004-6361/201220967