The L1157-B1 astrochemical laboratory: testing the origin of DCNG. Busquet, F. Fontani, S. Viti, C. Codella, B. Lefloch, M. Benedettini and C. CeccarelliA&A, 604 (2017) A20DOI: https://doi.org/10.1051/0004-6361/201730422