The spectroscopic binary system Gl 375 - I. Orbital parameters and chromospheric activity R. F. Díaz, J. F. González, C. Cincunegui and P. J. D. Mauas A&A, 474 2 (2007) 345-353 Published online: 28 August 2007 DOI: 10.1051/0004-6361:20078195