C/O vs. Mg/Si ratios in solar type stars: The HARPS sampleL. Suárez-Andrés, G. Israelian, J. I. González Hernández, V. Zh. Adibekyan, E. Delgado Mena, N. C. Santos and S. G. SousaA&A, 614 (2018) A84DOI: https://doi.org/10.1051/0004-6361/201730743