Zadorozhna, L. V., B. I. Hnatyk, and Yu. A. Sitenko. “Magnetic Field of Cosmic Strings in the Early Universe”. Ukrainian Journal of Physics 58, no. 4 (October 6, 2018): 398. Accessed December 8, 2021. https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018308.