Monaco, L., Bonifacio, P., Sbordone, L., Villanova, S., & Pancino, E. (2010). The lithium content of ω Centauri - new clues to the cosmological Li problem from old stars in external galaxies. Astronomy & Astrophysics, 519: L3, pp. 1-7. doi:10.1051/0004-6361/201015162.