Introduction : the Russian Federation and new challenges of modern warfareMölder, Holger; Sazonov, Vladimir; Chochia, Archil; Kerikmäe, TanelThe Russian Federation in global knowledge warfare : influence operations in Europe and its neighbourhood2021 / p. 1-9https://doi.org/10.1007/978-3-030-73955-3_1https://www.ester.ee/record=b5434182*est