Diffusion measurements of CO, HNCO, H2CO, and NH3 in amorphous water ice F. Mispelaer, P. Theulé, H. Aouididi, J. Noble, F. Duvernay, G. Danger, P. Roubin, O. Morata, T. Hasegawa and T. Chiavassa A&A, 555 (2013) A13 Published online: 19 June 2013 DOI: 10.1051/0004-6361/201220691