Ваbак V. I., I. I. Rokityansky, E. Yu. Sokolova, and Теreshin A. V. “Annual, 11-Year Period and Aperiodic Variations of the Induction Vector by Eight Observatories of Intermagnet Network”. Geofizicheskiy Zhurnal 39, no. 1 (March 1, 2017): 97–110. Accessed November 23, 2024. https://journals.uran.ua/geofizicheskiy/article/view/94013.