Asplund, M. Stellar Astrophysics, MPI for Astrophysics, Max Planck Society;
Pereira, T. M. D., Asplund, M., & Kiselman, D. (2009). Oxygen lines in solar granulation - II. Centre-to-limb variation, NLTE line formation, blends, and the solar oxygen abundance. Astronomy & Astrophysics, 508(3), 1403-1416. doi:10.1051/0004-6361/200912840.