DQ white-dwarf stars with low C abundance: possible progenitors C. G. Scóccola, L. G. Althaus, A. M. Serenelli, R. D. Rohrmann and A. H. Córsico A&A, 451 1 (2006) 147-155 Published online: 25 April 2006 DOI: 10.1051/0004-6361:20053769