S.G. Ovchinnikov, V.A. Gavrichkov, M.M. Korshunov, and E.I. Shneyder, Electron structure and electron-phonon interaction in the strongly correlated electron system of cuprates: Strong Correlations, Low Temp. Phys. 32, (2006) [Fiz. Nizk. Temp. 32, 634-640, (2006)] DOI: https://doi.org/10.1063/1.2199450.