ABSTRACT
We construct explicitly a subgroup of finite minimal index and minimal rank in which is a direct products of free groups for each finite group G for which this is possible.
Acknowledgments
The second author has been partially supported by the DGES (PB96-0961-C02-02) and Comunidad Autónoma de Murcia (project PB/16/FS/97 of Fundación Séneca).