Kostogryz, N. M., Milic, I., Berdyugina, S. V., & Hauschildt, P. H. (2016). Center-to-limb variation of intensity and polarization in continuum spectra of FGK stars for spherical atmospheres. Astronomy and Astrophysics, 586: A87. doi:10.1051/0004-6361/201527598.