The effects of mutual density relaxation have been illustrated in that work in terms of the dipole moment of an HCN tetramer, for which the results of a DMRG(40,36)-SCF calculation could be well approximated by an DMRG -SCF calculation on an embedded dimer. Several studies involving WF-in-DFT embedding carried out by the Carter group have been discussed above already, see Section 5.6. Moreover, we refer to Section 6.1.9 concerning applications of WF-in-DFT embedding making use of projection techniques.