Subphotospheric convection and magnetic activity dependence on metallicity and age: Models and testsN. Pizzolato, P. Ventura, F. D'Antona, A. Maggio, G. Micela and S. SciortinoA&A, 373 2 (2001) 597-607DOI: https://doi.org/10.1051/0004-6361:20010626