Kovalev, Y., Kovalev, Y. A., Nizhelsky, N. A., Kovalev, Y. Y., Troitsky, S. V., Zhekanis, G. V., Tsibulev, P. G., Pustilnik,
S. A., Mingaliev, M. G., Sotnikova, Y. V., Erkenov, A. K., Soglasnov, V. A., Popkov, A. V., & Plavin, A. V. (2022).
The keys by Nikolai Kardashev and Yuri Parijskij to the Nature of Active Galactic Nuclei. In The Multifaceted
Universe: Theory and Observations - 2022 (pp. 27).