Lyman continuum escape fraction and mean free path of hydrogen ionizing photons for bright z ∼ 4 QSOs from SDSS DR14M. Romano, A. Grazian, E. Giallongo, S. Cristiani, F. Fontanot, K. Boutsia, F. Fiore and N. MenciA&A, 632 (2019) A45DOI: https://doi.org/10.1051/0004-6361/201935550
