New insight into the formation of hexamethylenetetramine (HMT) in interstellar and cometary ice analogsV. Vinogradoff, F. Duvernay, G. Danger, P. Theulé and T. ChiavassaA&A, 530 (2011) A128DOI: https://doi.org/10.1051/0004-6361/201116688