Gravitational settling in pulsating subdwarf B stars and their progenitors Haili Hu, E. Glebbeek, A. A. Thoul, M.-A. Dupret, R. J. Stancliffe, G. Nelemans and C. Aerts A&A, 511 (2010) A87 Published online: 17 March 2010 DOI: 10.1051/0004-6361/200912290