Exploring the α-enhancement of metal-poor planet-hosting stars. The Kepler and HARPS samples V. Zh. Adibekyan, E. Delgado Mena, S. G. Sousa, N. C. Santos, G. Israelian, J. I. González Hernández, M. Mayor and A. A. Hakobyan A&A, 547 (2012) A36 Published online: 25 October 2012 DOI: 10.1051/0004-6361/201220167