Iron abundance in the prototype PG 1159 star, GW Vir pulsator PG 1159 − 035, and related objects K. Werner, T. Rauch, J. W. Kruk and R. L. Kurucz A&A, 531 (2011) A146 Published online: 04 July 2011 DOI: 10.1051/0004-6361/201116992