Kostenko, Vitaly V., Volodymyr M. Kuklin, and Eugen V. Poklonskiy. “On the Periodic Change of the Luminosity of the Cosmic Sources With an Active Medium”. East European Journal of Physics0, no. 2 (April 3, 2020): 48-56. Accessed April 26, 2024. https://periodicals.karazin.ua/eejp/article/view/15537.