1. "1. Cașin, M. (2018). Understanding NATO's New CIP Policies: Common Efforts and Solidarity. In Gluschke, G., Cașin, M., Macori, M. (Eds.). Cyber Security policies and Critical Infrastructure Protection. Institute for Security and Safety Press, https://uniss.org/cyber-security-policiesand-critical-infrastructure-protection/, retrieved on 12 September 2021.
2. 2. Delanoë, I. (2015). Weapons of Mass Destruction - a Persisting Security Challenge in the Black Sea Region. Neighborhood Policy Paper, 16. Center for International and European Studies, https:// www.files.ethz.ch/isn/193512/NeighbourhoodPolicyPaper(16).pdf, retrieved on 12 September 2021.
3. 3. Eusgeld, I., Nan, C., Dietz, S. (2011). "System-of-systems" approach for interdependent critical infrastructures. Reliability Engineering System Safety 96(6):679-686, DOI: 10.1016/j.ress.2010.12.010.
4. 4. Gänzle, S., Kern, K. (2016). Macro-regions, 'Macro-regionalization' and Macro-regional Strategies in the European Union: Towards a New Form of European Governance?. In Gänzle, S., Kern, K. (Eds.) A 'Macro-regional' Europe in the Making, Palgrave Studies in European Union Politics series. Palgrave Macmillan, Londra, doi: 10.1007/978-1-137-50972-7_1, https://link.springer.com/chapter/ 10.1007/978-1-137-50972-7_1, retrieved on 21 September 2021.
5. 5. Gänzle, S. (2017). Macro-regional strategies of the European Union, Russia and multilevel governance in Northern Europe. In Journal of Baltic Studies, 48(4), 1-10. doi:10.1080/01629778.2017.1305201.