JUZA, Peter. Лев Гумилев: энциклопедия: Lev Gumilyov: encyclopedia. Slovak Journal of Public Policy and Public Administration, [S. l.], v. 1, n. 1, 2014. Disponível em: https://sjpppa.fsvucm.sk/index.php/journal/article/view/15. Acesso em: 27 apr. 2025.