Rokityansky, I.I. and Tereshyn, A.V. 2019. Spectra of the geomagnetic field diurnal variations. Geofizicheskiy Zhurnal. 41, 5 (Nov. 2019), 105–114. DOI:https://doi.org/10.24028/gzh.0203-3100.v41i5.2019.183633.