Spectroscopy and polarimetry of the gravitationally lensed quasar SDSS J1004+4112 with the 6m SAO RAS telescopeL. Č. Popović, V. L. Afanasiev, A. Moiseev, A. Smirnova, S. Simić, Dj. Savić, E. G. Mediavilla and C. FianA&A, 634 (2020) A27DOI: https://doi.org/10.1051/0004-6361/201936088
