Ваbак V. I., I. I. Rokityansky, E. Yu. Sokolova, and Теreshin A. V. 2017. “Annual, 11-Year Period and Aperiodic Variations of the Induction Vector by Eight Observatories of Intermagnet Network”. Geofizicheskiy Zhurnal 39 (1):97-110. https://doi.org/10.24028/gzh.0203-3100.v39i1.2017.94013.