Variability of the near-infrared extinction curve towards the Galactic centre F. Nogueras-Lara, R. Schödel, F. Najarro, A. T. Gallego-Calvente, E. Gallego-Cano, B. Shahzamanian and N. Neumayer A&A, 630 (2019) L3 Published online: 23 September 2019 DOI: 10.1051/0004-6361/201936322