  Within the massive field theoretical renormalization group approach the
expressions for the beta- and gamma-functions of the anisotropic mn-vector
model are obtained for general space dimension d in three-loop approximation.
Resumming corresponding asymptotic series, critical exponents for the case of
the weakly diluted quenched Ising model (m=1, n=0), as well as estimates for
the marginal order parameter component number m_c of the weakly diluted
quenched m-vector model are calculated as functions of d in the region 2 =< d
<4. Conclusions concerning the effectiveness of different resummation
techniques are drawn.
