Chromospheric activity of stars with planetsB. L. Canto Martins, M. L. das Chagas, S. Alves, I. C. Leão, L. P. de Souza Neto and J. R. de MedeirosA&A, 530 (2011) A73DOI: https://doi.org/10.1051/0004-6361/201015314