2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/28720The doped cuprates are considered to be a system of local spinless bosons moving in a lattice of the hole pseudo-Jahn-Teller centers CuO_{4}^{5-}. A detailed qualitative and quantitative description of the vibronic mechanism determining both the isotope substitution and the external pressure effect on T_c is given. This mechanism can properly interpret the principal peculiarities of isotopic and baric effects in cuprates except the region of the well developed percolation phenomena6 pages; to appear in Proceedings of XIV Int. Symposium on Electron-Phonon Dynamics and Jahn-Teller EffectSuperconductivitytext