  In this work we investigate doping and temperature dependences of electronic
structure of system with strong electronic correlations and strong
electron-phonon interaction modeling cuprates in the frameworks of the
three-band p-d-Holstein model by a polaronic version of the generalized tight
binding (GTB) method. Within this approach the electronic structure is formed
by polaronic quasiparticles constructed as excitations between initial and
final polaronic multielectron states. Doping and temperature effects are taken
into account by occupation numbers of local excited polaronic states and
variations in the magnitude of spin-spin correlation functions. Both effects
are manifested in the reconstruction of band structure, Fermi contours, density
of states and redistribution of the spectral weight over the Hubbard polaron
subbands. Doping leads to transformation of Fermi contour from small hole
pockets around k=(pi/2,pi/2) with inhomogeneous spectral weight distribution at
small hole concentration to large contour around k=(pi,pi) in the overdoped
compound as a result of two quantum phase transitions. In the system with
phonon subsystem and EPI doping results in the top of the valence band
splitting off and new polaron subbands appearance. Temperature increasing in
the system with doped holes and moderate EPI leads to formation of the flatband
around k=(pi,pi) and transfer of the spectral weight to the splitted off top of
the valence band.
