Interstellar extinction and long-period variables in the Galactic centre M. Schultheis, K. Sellgren, S. Ramírez, S. Stolovy, S. Ganesh, I. S. Glass and L. Girardi A&A, 495 1 (2009) 157-168 Published online: 22 December 2008 DOI: 10.1051/0004-6361:200810342