5Brunhes B. Recherches sur la direction de l'aimantation des roches volcaniques. J Phys, 1906, 5:705-724.
6Matuyama M. On the direction of magnetization of basalts in Japan, Tyosen and Manchuria. In: Proceedings of the Imperial Academy of Japan, 1929, 5:203-205.
7Biggin A J, de Wit M J, Langereis C G, et al. Palaeomagnetism of Archaean rocks of the Onverwacht Group, Barberton Greenstone Belt (southern Africa): Evidence for a stable and potentially reversing geomagnetic field at ca. 3.5 Ga. Earth Planet Sci Lett, 2011, 302: 314-328.
8Tarduno J A, Cottrell R D, Davis W J, et al. A Hadean to Paleoarchean geodynamo recorded by single zircon crystals. Science, 2015, 349: 521-524.
9Merrill R T, McElhinny M W, McFadden P L. The Magnetic Field of the Earth: Paleomagnetism, the Core and the Deep Mantle. San Di- ego: Academic Press, 1996.
10Hongre L, Hulot G, Khokhlov A. Art analysis of the geomagnetic field over the past 2000 years. Phys Earth Planet Int, 1998, 106: 311-335.
