1. Achache, J., Courtillot, V., Ducruix, J., and Le Mouël, J.-L., The late 1960’s impulse: Further constraints on deep mantle conductivity, Phys. Earth Planet. Inter., 1980, vol. 23, pp. 72–75.
2. Alexandrescu, M., Gibert, D.G., Hulot, G., Le Mouël, J.-L., and Saracco, G., Detection of geomagnetic jerks using wavelet analysis, J. Geophys. Res., 1995, vol. 100, pp. 12 557–12 572.
3. Backus, G.E., Application of mantle filter theory to the geomagnetic jerk of 1969, Geophys. J. R. Astron. Soc., 1983, vol. 74, pp. 713–746.
4. Braginsky S.I., Magnetohydrodynamic twisting oscillations in the core of the Earth and variations of the day length, Geomagn. Aeron., 1970, vol. 10, no 1, pp. 3-12.
5. Braginsky S.I. The analytical description of secular variations of the geomagnetic field and velocity of the Earth rotation, Geomagn. Aeron., 1982, vol. 22, no. 1, pp. 115-122.