Molecular shock tracers in NGC 1068: SiO and HNCO G. Kelly, S. Viti, S. García-Burillo, A. Fuente, A. Usero, M. Krips and R. Neri A&A, 597 (2017) A11 Published online: 19 December 2016 DOI: 10.1051/0004-6361/201628946