Ladanivskiy, B. T., V. Yu. Semenov, and I. M. Logvinov. 2010. “Methods of Magneto-Variation Sounding of the Earth’s Mantle Within the Range of Periods 10 4 -10 5 S”. Geofizicheskiy Zhurnal 32 (3):50-59. https://doi.org/10.24028/gzh.0203-3100.v32i3.2010.117533.