Probing the jet base of the blazar PKS 1830−211 from the chromatic variability of its lensed images - Serendipitous ALMA observations of a strong gamma-ray flare
I. Martí-Vidal, S. Muller, F. Combes, S. Aalto, A. Beelen, J. Darling, M. Guélin, C. Henkel, C. Horellou, J. M. Marcaide, S. Martín, K. M. Menten, Dinh V-Trung and M. Zwaan
