Readings: Jirusek, Vlcek, Kodouskova, Robinson, Leshchenko, Lehotsky and Zapletalova 2015, p. 338-362 (25 pages); Oxenstierna 2014 (19 pages); Thomas 2018 (12 pages); The European Centre of Excellence for Countering Hybrid Threats 2019 (31 pages); Schepers 2019 (16 pages); Vlcek 2016 (9 pages)