• Challenges to Homeland Security in Countering Latent Hybrid Threats During the War in Ukraine : The Case of EstoniaMölder, Holger; Sazonov, Vladimir; Loik, RamonRussian Influence Operations and the War in Ukraine: Hybrid Warfare and Disinformation Campaigns2025 / p. 235-260 https://link.springer.com/book/10.1007/978-3-032-01461-0 https://doi.org/10.1007/978-3-032-01461-0_10