Doerr, H.-P. Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society;
Caffau, E., Ludwig, H.-G., Steffen, M., Livingston, W., Bonifacio, P., Malherbe, J.-M., et al. (2015). The photospheric solar oxygen project. III. Investigation of the centre-to-limb variation of the 630 nm [O I]-Ni I blend. Astronomy and Astrophysics, 579: A88. doi:10.1051/0004-6361/201526331.