Bernholz, P. (2007) Ideology, sects, state and totalitarianism. In Maier, H., & Schäfer, M. Totalitarianism and Political Religions, Volume II. Concepts for the comparison of dictatorship, 246-271. London: Routledge.
Buzo, A. (2003). Partyzánská dynastie. Politika a vedení Severní Koreje. Praha: BB Art
Cheon, S. (2013). The Kim Jong-un Regime’s „Byungjin“ (Paralled Development) Policy of Economy and Nuclear Weapons and the ‘April 1st Nuclearization Law‘, Korean Institute for National Unification
Nicolai Todorov Dolchinkov and Nicolai Bonev Nichev
Bulgarian Nuclear Regulatory Agency. (2016). Annual report of 2015, Sofia: Bulgarian nuclear regulatory agency, available at: http://www.bnra.bg/en/documents-en/annrep/anrepeng-2015.
The Council of Ministers. (2011). National programme on disaster the 2014 -2018, Sofia: the Council of Ministers.
The Council of Ministers. (2013). National report on the status and protection of the environment in Bulgaria in 2012 of the EEA, Sofia: The Council of Ministers.
The Council of Ministers
 Nuclear spy ring consists of Julius and Ethel Rosenberg, Harry Gold, Klaus Fuchs, David and Ruth Greenglass
 Kim Plilby
 Dangle - A person sent by the intelligence agency of his or her own country who approaches an intelligence agency in the hope of being recruited as a spy so as to allow a double agent operation
Flin, R. (2007). Measuring safety culture in healthcare: A case for accurate diagnosis. Safety Science, 45(6), 653-667. https://doi.org/10.1016/j.ssci.2007.04.003
Garg, A. (1999). Long-term effectiveness of “zero-lift program” in seven nursing homes and one hospital, Cincinnati, OH: National Institute for Occupational Safety and Health, Center for Disease Control and Prevention, U.S. Department of Health & Human services; 106.
Gershon, R. M., Karkashian C. D., & Grosch, J. W. (2000). Hospital safety climate