Sumaruk, P. V., and T. P. Sumaruk. 2018. “Secular Variations of the Geomagnetic Field on Litosphere Plates of the Earth”. Geofizicheskiy Zhurnal 40 (1):118-33. https://doi.org/10.24028/gzh.0203-3100.v40i1.2018.124021.