Behavior of the Paleosecular Variation During the Permian-Carboniferous Reversed Superchron and Comparisons to the Low Reversal Frequency Intervals Since Precambrian Times - Oliveira, Wellington; Franco, Daniel Ribeiro; Brandt, Daniele; Ernesto, Márcia; Ponte Neto, Cosme Ferreira da; Zhao, Xixi; Freitas, Felipe Barbosa Venâncio de; Martins, Ricardo San'Anna (Geochemistry, Geophysics, Geosystems, 2018)