“…Finite dimensional models for EG have been constructed for several interesting classes of groups, for example, word-hyperbolic groups (Juan-Pineda, Leary, [19]), relatively hyperbolic groups (Lafont, Ortiz, [21]), virtually polycyclic groups (Lück,Weiermann, [29]) and CAT(0)-groups (Farley,[9], Lück, [27]).…”