  We discuss a reduction of superconducting transition temperature by the
intersite Coulomb repulsion for the d-wave pairing in cuprates. We compare the
results found for the spin-fermion model and the extended Hubbard model. We
argue that in both the models the d-wave superconducting transition temperature
is reduced by the Coulomb repulsion of holes in different unit cells. We also
show that in the strong correlation limit the s-wave superconductivity cannot
occur due to the kinematic restriction of no double occupancy in the Hubbard
subbands.
