Four new planets around giant stars and the mass-metallicity correlation of planet-hosting stars M. I. Jones, J. S. Jenkins, R. Brahm, R. A. Wittenmyer, F. Olivares E., C. H. F. Melo, P. Rojo, A. Jordán, H. Drass, R. P. Butler and L. Wang A&A, 590 (2016) A38 Published online: 04 May 2016 DOI: 10.1051/0004-6361/201628067