2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/27024It is shown that the anomalous temperature dependence of the orbital part of the upper critical field $H_{c2}$ observed for epitaxially grown films of high-temperature superconductor $Bi-Sr-Cu-O$ (in wide temperature interval) can be satisfactorily explained by the influence of localization effects in two-dimensional (quasi-two-dimensional) case.8 pages, RevTeX 2.0, 1 Figure attached, IEF-LTF 93-4Condensed Mattertext