Convective blueshifts in the solar atmosphere - III. High-accuracy observations of spectral lines in the visibleJ. Löhner-Böttcher, W. Schmidt, R. Schlichenmaier, T. Steinmetz and R. HolzwarthA&A, 624 (2019) A57DOI: https://doi.org/10.1051/0004-6361/201834925
