@inproceedings{Bridson2007SubgroupsOD,
title={Subgroups of direct products of limit groups},
author={Martin R. Bridson and James Howie and Charles F. Miller},
year={2007}
}

If 1; : : : ; n are limit groups and S 1 n is of type FPn.Q/ then S contains a subgroup of finite index that is itself a direct product of at most n limit groups. This answers a question of Sela.