Tsvetkov, Yu. P., S. V. Filippov, V. V. Ivanov, and O. M. Brekhov. “Magnetic Measurements in the Stratosphere and Their Role in the Studies of Magnetic Field of the Earth”. Geofizicheskiy Zhurnal 38, no. 5 (August 1, 2016): 67–74. Accessed August 15, 2022. http://journals.uran.ua/geofizicheskiy/article/view/107822.