Inference for stellar opacities from seismic studies of the hybrid β Cep/SPB pulsators Przemysław Walczak, Jadwiga Daszyńska-Daszkiewicz and Alexey Pamyatnykh EPJ Web Conf., 152 (2017) 06005 Published online: 08 September 2017 DOI: 10.1051/epjconf/201715206005