O. V. Pylypovskyi, D. D. Sheka, V. P. Kravchuk, Y. B. Gaididei, and F. G. Mertens, “Mechanism of Fast Axially Symmetric Reversal of Magnetic Vortex Core”, Ukr. J. Phys., vol. 58, no. 6, p. 596, Oct. 2018.