Leonardo Sagnotti; Giancarlo Scardia; Biagio Giaccio; Joseph C. Liddicoat; Sebastien Nomade; Paul R. Renne; Courtney J. Sprain (21 July 2014). "Extremely rapid directional change during Matuyama-Brunhes geomagnetic polarity reversal". Geophys. J. Int. 199 (2): 1110–1124. Bibcode:2014GeoJI.199.1110S. doi:10.1093/gji/ggu287.
Leonardo Sagnotti; Giancarlo Scardia; Biagio Giaccio; Joseph C. Liddicoat; Sebastien Nomade; Paul R. Renne; Courtney J. Sprain (21 July 2014). "Extremely rapid directional change during Matuyama-Brunhes geomagnetic polarity reversal". Geophys. J. Int. 199 (2): 1110–1124. Bibcode:2014GeoJI.199.1110S. doi:10.1093/gji/ggu287.