1. E. A. Baranovskii and V. P. Tarashchuk, “Lithium Abundance in Sunspots,” Bull. Crim. Astrophys. Obs. 104, 19–25 (2008).
2. M. Asplund, N. Grevesse, A. J. Sauval, and P. Scott, “The Chemical Composition of the Sun,” Annu. Rev. Astron. Astrophys. 47, 481–522 (2009).
3. E. A. Baranovsky, “Semiempirical LTE Modeling of Solar Photospheric Layers. I. Theoretical Background,” Contrib. Astron. Obs. Skalnate Pleso 23, 107–117 (1993).
4. M. Carlsson, R. J. Rutten, J. H. M. J. Bruls, and N. G. Shchukina, “The Non-LTE Formation of Li I Lines in Cool Stars,” Astron. Astrophys. 288, 860–882 (1994).
5. O. Engvold, O. Kjeldseth Moe, and P. Maltby, “The Solar Lithium Abundance,” Astron. Astrophys. 9, 79–85 (1970).