Revealing the structure of the lensed quasar Q 0957+561 - I. Accretion disk sizeC. Fian, E. Mediavilla, J. Jiménez-Vicente, V. Motta, J. A. Muñoz, D. Chelouche, P. Goméz-Alvarez, K. Rojas and A. HanslmeierA&A, 654 (2021) A70DOI: https://doi.org/10.1051/0004-6361/202039854
