Nonlinear Response of a Superconductor of the Bi-Sr-Ca-Cu-O System to an Alternating Magnetic Field in the Superconducting Transition Temperature RangeAlexander Sergeev, Igor Golev, Victoria Gvozdevskaya and Anastasia BarkalovaEPJ Web Conf., 185 (2018) 08005DOI: https://doi.org/10.1051/epjconf/201818508005