Future normative challengesTikk, EnekenThe Oxford handbook of cyber security2021 / p. 751–768 https://doi.org/10.1093/oxfordhb/9780198800682.013.50 The role of defence in national cybersecurity get access arrowKerttunen, MikaThe Oxford handbook of cyber security2021 / p. 447–462 https://doi.org/10.1093/oxfordhb/9780198800682.013.27