Hybrid threats: a strategic communications perspective [Online resource]Aday, Sean; Andžāns, Maris; Berziņa-Čerenkova, Una; Mattiisen, Mariita; Mölder, Holger; Sazonov, Vladimir2019 https://www.stratcomcoe.org/hybrid-threats-strategic-communications-perspective https://www.ester.ee/record=b5282158*est