GIERSZEWSKI, Janusz. The Importance of the System Category in Security Studies. Historia i Polityka, [S. l.], n. 44 (51), p. 55–72, 2023. DOI: 10.12775/HiP.2023.012. Disponível em: https://apcz.umk.pl/HiP/article/view/46928. Acesso em: 10 grudz. 2025.