The role of mass transfer and common envelope evolution in the formation of merging binary black holesPablo Marchant, Kaliroë M. W. Pappas, Monica Gallegos-Garcia, Christopher P. L. Berry, Ronald E. Taam, Vicky Kalogera and Philipp PodsiadlowskiA&A, 650 (2021) A107DOI: https://doi.org/10.1051/0004-6361/202039992