Lithium and zirconium abundances in massive Galactic O-rich AGB stars D. A. García-Hernández, P. García-Lario, B. Plez, A. Manchado, F. D'Antona, J. Lub and H. Habing A&A, 462 2 (2007) 711-730 Published online: 26 September 2006 DOI: 10.1051/0004-6361:20065785