On the Kennicutt-Schmidt scaling law of submillimetre galaxies O. Miettinen, I. Delvecchio, V. Smolčić, M. Aravena, D. Brisbin and A. Karim A&A, 602 (2017) L9 Published online: 15 June 2017 DOI: 10.1051/0004-6361/201731157